Description
Companies in all sectors are examining ways to reduce costs, shorten product development times and manage risk. The transactions between companies in supply chains are characterised by adding value up through the chain and incurring costs (and consequent payments) down the chain.
Int. J. Production Economics 65 (2000) 179}190
Supply chain management: A strategic issue in engineer to order
manufacturing
C. Hicks*, T. McGovern, C.F. Earl
Department of Mechanical, Materials and Manufacturing Engineering, University of Newcastle, Stephenson Building, Newcastle upon Tyne,
NE1 7RU, UK
School of Management, University of Newcastle upon Tyne, Newcastle upon Tyne, UK
Received 13 May 1997; accepted 1 February 1999
Abstract
The characteristics of Engineer to Order (ETO) companies are described in terms of their markets, products and the
internal processes of their organisation. These are set in the context of current trends in supply chain management. The
business processes associated with the procurement and marketing functions and the interactions with other processes
are analysed. These are compared for a number of di!erent types of ETO company. The variety of work in ETO projects,
the customised, complex products and the underlying uncertainties of markets all indicate that procurement and
marketing need to be integrated with other processes, particularly tendering and design. These characteristics put
constraints on the application of established supply chain management methods. It is argued that a strategic view of
supply chain management in which procurement makes a greater contribution in the tendering and early product
development activities has the potential to improve performance. 2000 Elsevier Science B.V. All rights reserved.
Keywords: Supply chain management; Engineer to order; Business processes; Strategy
1. Introduction
Companies in all sectors are examining ways to
reduce costs, shorten product development times
and manage risk. The transactions between com-
panies in supply chains are characterised by adding
value up through the chain and incurring costs (and
consequent payments) down the chain. Supply
chain management aims to reduce costs, risk and
lead-times associated with these transactions, thus
releasing value. There is limited research into sup-
ply chain management in the low-volume Engineer
to Order (ETO) sector. This is in contrast to the
*Corresponding author.
extensive literature on the high-volume sector, par-
ticularly automotive and electronics [1,2].
This paper examines how the special nature of
the ETO business constrains the application of
supply chain methodologies. The characteristics of
ETO companies and associated supply chain man-
agement issues were derived from studies of ETO
companies involved in the design, manufacture and
construction of capital equipment for the power,
materials handling and o!shore industries. The re-
search focused on modelling business processes,
planning and control, analysis of speci"cations and
supply chain management.
A business process approach to describing ETO
companies was adopted. This helps to identify the
0925-5273/00/$- see front matter 2000 Elsevier Science B.V. All rights reserved.
PII: S 0 9 2 5 - 5 2 7 3 ( 9 9 ) 0 0 0 2 6 - 2
Table 1
Collaborating ETO companies and their products
Company Turnover Employees Products Typical order
(Cm)
Customisation Depth of
product
structure
A 200 800 Steam turbine-generators 50}300 High Deep
B 200 3500 Oil platforms 20}25 High Deep
C 75 400 Power station boilers 50 High Deep
D 125 100 Mechanical handling 20 High Deep
E 25 50 Mechanical handling 10 High Deep
F 25 100 Electronic control systems 3 High Medium
G 150 600 Switchgear 50}100 Low Medium
Company also project manages power station contracts. This business has a high level of outsourcing as the company only
manufactures turbine generators.
Customisation: Low } mainly standard products, Medium } customised options, High } engineer to order.
Depth of product structure: Shallow } 1 to 3 levels, Medium } 3 to 6 levels, Deep } '6 levels.
nature of relationships between customers and sup-
pliers. These are particularly complex in ETO busi-
nesses, which are involved in many di!erent types
of supplier relationships. A systems modelling ap-
proach to representing this complexity is reported
elsewhere [3]. The ways that internal organisation
and structure constrain the role of supply chain
management in ETO companies are considered.
The paper does not investigate in any detail the
consequent issues of supply chain relationships, but
rather identi"es the environment in which these
relationships are established and maintained. Pro-
curement decisions in ETO companies are analysed
from an operational and strategic perspective.
2. Description of ETO companies
The research was conducted in collaboration
with seven companies in the power generation,
high-integrity materials handling and o!shore sec-
tors. The main business activities of the companies
are the design, manufacture and construction of
capital equipment. A summary of the character-
istics of the collaborating companies and their
products is shown in Table 1.
Companies A, B, Dand G are the largest in terms
of turnover and number of employees. For all the
companies except company F, each order is a large
proportion of annual turnover and is therefore of
strategic importance. A}F are ETO companies that
supply highly customised products to meet indi-
vidual customer requirements. Company G has
high value orders but these are typically for over 10
units. It has a standardised range of products that
are con"gured to meet a broad range of national
and international electrical distribution require-
ments. They are supplied on a make to order basis.
Companies A}E produce products with complex
and deep product structures whilst companies
F and G produce less complicated items with
a shallower product structure.
A summary of the collaborating companies and
their business processes is provided in Table 2. All
of the companies have design and project manage-
ment capabilities. These are considered to be core
competencies in all cases. Companies A}D also
perform manufacturing, factory-based assembly,
construction and commissioning at customers'
sites. Company E produces similar products to
company D but is much smaller in terms of turn-
over and numbers employed. It only has a design
and project management capability as all other
activities are outsourced. Company F produces
electronic control systems, which are designed to
meet individual customer requirements and are as-
sembled from generic electronic components. The
company installs and commissions its equipment at
customers' sites. Company G has a strong design
capability, but in general, products are developed
180 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
Table 2
Processes in collaborating companies
Company Processes Manufacturing
processes
Vertical
integration
A DPMACC JBFA High
B DPMACC JBA High
C DPMACC JBA High
D DPMACC JBA Medium
E DP None Low
F DPACC A Low
G DPMACC JBA High
Processes: D } design, P } project management, M } manufac-
turing, A } assembly, CC } construction and commissioning.
Manufacturing processes: J } jobbing, B } batch, F } #ow,
A } assembly.
Table 3
Supply chain management in collaborating companies
Company Outsourcing Supplier base Strategic
alliances
Partnership
agreements
Single
sourcing
agreements
A Extensive Reduced Yes Some No
B Extensive Reduced Yes Yes No
C Extensive Reduced No No No
D Extensive Diverse No No No
E All physical processes Diverse No No No
F All manufacturing Diverse No No No
G Extensive Reduced No No No
to meet the requirements of regional markets rather
than individual customers. The company has a wide
range of manufacturing and assembly processes and
installs and commissions its equipment on site.
Company A has the widest range of manufactur-
ing capability which includes jobbing, batch, #ow
and assembly processes and a wide range of manu-
facturing technologies. Fabrication of complex
structures is the main manufacturing activity for
companies B and C. This involves jobbing, batch
and assembly processes. Company D has a signi"-
cant fabrication capability, but it also produces
a wide range of mechanical components. It has
a range of jobbing, batch and assembly processes.
Company F does not manufacture components
and only performs assembly activities. Finally,
company G has a wide range of manufacturing
technologies ranging from steel pressing through
to electrical assembly and testing. These include
jobbing, batch and assembly processes.
The level of vertical integration and outsourcing
varies considerably within this group of companies.
It can be seen that companies A, B, C and G are
highly vertically integrated with substantial manu-
facturing capabilities. These companies manufac-
ture most of their products in-house, but outsource
standard components and systems. The level of
outsourcing is greater for company B as it produces
structural components but outsources all mechan-
ical systems. Company D, although having some
manufacturing capability, is less vertically integ-
rated than companies A, B and C. It is, therefore,
more dependent upon outsourced items. Com-
panies E and F are not vertically integrated and are
therefore more dependent upon their suppliers.
Table 3 shows some of the characteristics of
supply chain management in the collaborating
companies. It can be seen that all of the companies
are highly dependent upon outsourcing. This is
particularly so for company E which outsources all
of its physical activities and company F that only
performs assembly, construction and commission-
ing activities. Companies A}C and G have reduced
their supplier base whereas companies D, E and
F still have a large number of suppliers. Companies
A and B have established strategic alliances with
their customers and suppliers. Company B, in par-
ticular, has derived substantial competitive advant-
age from this approach. Only companies A and B
have formal partnership agreements with their sup-
pliers, but these are not single sourcing agreements.
C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190 181
The ETO sector encompasses many types of com-
pany, designing and manufacturing a diverse range
of products. Individual products are generally highly
customised to meet individual customer require-
ments and are produced in low volume on an engin-
eer, or make to order basis. The main products have
deep and complex product structures that give rise
to many levels of assembly process. They contain
a diversity of components, some of which are re-
quired in very low volume, whereas others are re-
quired in medium or large quantities. Certain
components and systems are highly customised
whilst others are standardised. Some components
such as the control systems are technologically ad-
vanced whereas other items such as structural steel-
work are not. In general, high levels of customisation
lead to increased costs, higher risks and long lead-
times. It also makes outsourcing more di$cult as
component and subsystems requirements are only
fully speci"ed after the design process has taken
place. Most of the companies have recognised these
di$culties and are trying to increase design standar-
disation based upon modular design principles. In
many cases, this approach has proved di$cult due
to diverse customer requirements. Many designers
also have a strong desire to produce creative cus-
tomised solutions.
3. Business processes in ETO companies
For the purposes of describing the business pro-
cesses within ETO companies we decompose the
complex processes of interaction with customers
and suppliers into three stages. The "rst stage is
marketing, which is a two-way process that devel-
ops potential customers' awareness of the company
and its products. It provides an opportunity for the
ETO company to identify market trends, technical
and non-technical customer requirements, as well
as the customer's criteria for assessing competing
o!ers. It is based upon relationship marketing [4].
Decisions on whether an invitation to tender is
worth responding to are made at this stage. These
are based upon an assessment of customer require-
ments, commercial factors, the company's ability to
compete and the likelihood of success. Where the
markets for major products are in decline, the
marketing activity may include identifying new
business opportunities that can be exploited using
existing expertise and resources. Over the last dec-
ade, the nature and signi"cance of the marketing
function has changed in the collaborating com-
panies. It is now strategic. The privatisation of the
electricity supply industry has transformed the
competitive environment for companies A, C,
F and G. The decline in the oil price, the shift
towards smaller oil "elds, and the globalisation of
the industry has had a similar e!ect on company B.
The second stage is the response to an invitation
to tender for a particular contract. The tender in-
volves the preliminary development of the concep-
tual design and the de"nition of major components
and systems. Contact with selected suppliers is
made at this stage to obtain information on costs
and lead-times. There are often a number of phases
of negotiation with suppliers that aim to match
overall project cost and lead-time with anticipated
customer and market requirements. A technical
speci"cation, delivery terms, price and commercial
terms are agreed at this stage. This represents a
major commitment. Success requires a detailed
understanding of customer needs including tech-
nical features, price, delivery and quality require-
ments. This would imply the need for a strategy
based upon customer intimacy [5]. Konijnendijk
[6] reported that the tendering success rate is often
less than 30%. Research with our collaborating
companies indicates that the strike rate is often
lower.
The third stage takes place after a contract has
been awarded. Initial activities are non-physical [7]
including the development of an overall project
plan and detailed design. This is followed by pro-
curement, then the physical processes associated
with component manufacturing, assembly,
construction and commissioning. The level of
involvement by the company itself in these physical
activities varies from company to company and is
dependent on the level of vertical integration. As in
other sectors, ETO companies are reducing the
degree of vertical integration as they increasingly
rely on outsourcing [8]. The interaction of pro-
cesses within these three stages will emerge as an
important aspect of our analysis of supply chain
management.
182 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
ETO companies respond to their markets in
unique ways [6]. The product range is mostly
based upon previous orders. Product innovation
may be general, such as developing an underlying
technology, or it may be speci"c to meeting the
requirements of a particular customer or order.
Medium- and long-term planning is usually based
upon aggregated information expressed in terms of
value or labour content. Typically a yearly sales
plan co-ordinates marketing and manufacturing
requirements. Decisions to outsource manufacture
are often taken at this level. Delivery dates in ten-
ders are based on lead-time estimates. These are
usually produced without information on available
capacity, as it is common for there to be several
`#oatinga quotations awaiting responses from
potential customers. Detailed speci"cations that
determine work content and duration are also
uncertain at this stage. It is, therefore, necessary to
reconsider the lead-times and delivery dates at the
order acceptance stage and to con"rm arrange-
ments with the customer. It may also be necessary
to review outsourcing decisions at this stage.
A key competitive factor in ETO markets is
delivery performance. Improving performance has
two components: reducing lead-time and increasing
the reliability of lead-time estimates. Lead-time re-
duction has been achieved by shortening the dura-
tion of individual processes and by increasing the
overlapping of previously sequential activities. Im-
provements in technology such as the application
of large multifunction machine tools can reduce
process times and improve dimensional accuracy.
This in turn reduces assembly times and their varia-
bility. Improvements in software support including
computer aided manufacturing (CAM), computer
aided production management (CAPM) systems,
computer aided design (CAD) enable faster
response, better planning and facilitate product
innovation. Concurrent engineering methods pro-
mote design for manufacturing and assembly as
well as the overlapping of these activities. Unex-
pected redesign and unnecessarily complex manu-
facture are avoided, thus giving more reliable lead-
time estimates. Delivery performance can also be
improved by streamlining products and processes
through modularity and standardisation. This may
be driven by the customer seeking familiar product
features and a minimum diversity of spare parts,
or by the supplier's desire to minimise costs and
complexity.
The ETO sector is characterised by a large
design content per order, the types of products
produced, the business processes and the nature of
the markets. Before proceeding to discuss how
these a!ect supply chain management in ETO com-
panies, di!erent approaches to vertical integration
within the sector are considered. Vertical integra-
tion is particularly relevant as it is a variable feature
in ETO organisations and a!ects the level and type
of outsourcing.
4. Vertical integration
The research undertaken has shown that ETO
companies can be classi"ed according to the level of
vertical integration. They span a continuum from
in-house manufacture of all components and as-
semblies at one extreme, to a pure design and
contract organisation at the other. Furthermore,
two types of design and contract business can be
identi"ed. In the "rst type, all items from suppliers
are delivered to site and the ETO company carries
out the construction and commissioning phase of
the work. In the second type, all physical activities
are undertaken by either suppliers or subcontrac-
tors. Only marketing, design, procurement and
project management are performed internally.
In considering the appropriate level of vertical
integration, ETO companies seek an optimum
response to a number of factors. These include:
reconciling customer delivery times with available
capacity; reducing costs; the availability of capital
for investment in equipment; potential utilisation of
plant; internal and external capabilities and #exibil-
ity. These factors vary from "rm to "rm giving rise
to di!ering levels of vertical integration. This varia-
bility makes it di$cult to prescribe best practice for
supply chain management in ETO companies. Our
observations on ETO companies suggest that there
has been a trend towards vertical disintegration
driven by "nancial pressures and the need for cost
reduction. Vertical disintegration can increase #ex-
ibility by making alternative product con"gura-
tions possible, but it can also reduce the scope of
C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190 183
Fig. 1. Vertically integrated ETO company.
concurrent engineering and the #exibility to deal
with design changes.
Fig. 1 illustrates the manufacturing processes
performed by a vertically integrated ETO com-
pany. The company produces, in low volumes,
a main product that has a deep product structure.
This typically consists of a number of major sub-
assemblies that have medium levels of product
structure that are delivered to the customer's site
for "nal assembly. These subassemblies are produc-
ed from a range of components that are manufac-
tured using jobbing, batch and #ow processes. An
example would be a large steam turbine generator.
The high-pressure, intermediate and low-pressure
turbines and the generator are delivered to site for
"nal construction and commissioning. The turbine
units consist of a turbine rotor and four turbine
casings that are produced in low volume on a job-
bing basis, together with several hundred blades
that are manufactured on a batch production basis.
The generator has components, such as the rotor
and the core frame, that are produced on a jobbing
basis, with some components (for example, the con-
ductor bars) that are required in intermediate
quantities. These are produced in batches. Each
generator also includes several hundred thousand
core plate laminations that are manufactured using
a dedicated #ow line.
The model in Fig. 1 above shows that the busi-
ness activities of ETO companies are more complex
than suggested by Tables 1 and 2. A service and
spare parts business supplies items with shallow
product structures. In some cases, additional busi-
ness activities have been developed to exploit ex-
pertise or to increase the utilisation of resources.
The main product and spares businesses tend to be
pro"t generators with the additional businesses
generating cash during times of low demand for the
major product. The spares and subcontract engin-
eering activities involve the jobbing and batch
production of components with shallow product
structure. For the main product, di!erent types of
manufacturing processes need to be co-ordinated
with common assembly and construction activities.
Fig. 1 describes the general structure of manufac-
turing activities undertaken by the vertically integ-
rated companies A, B, C, D and G.
The approach to the outsourcing of manufactur-
ing activities varies from "rm to "rm. A common
approach has been to concentrate on assembly
184 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
processes, as these are considered to result in high
levels of added value. Some companies have also
retained jobbing processes when manufacturing
technologies, or other capabilities, provide com-
petitive advantage. In some cases, such as the pro-
duction of large heavy components, in-house
manufacturing capability is necessary due to a lack
of potential suppliers. At the other extreme, some
ETO companies have outsourced all manufactur-
ing, assembly, construction and commissioning ac-
tivities as a mechanism for minimising overhead
costs.
In general, there has been an increase in out-
sourcing by ETO companies. This makes supply
chain management strategically important, because
of the reliance upon suppliers for technology,
design and manufacture. The next two sections
compare the ways that supply chain management is
addressed by companies in the high- and low-
volume sectors.
5. Supply chain management trends in high-volume
industries
In the high-volume industries, four key trends in
supply chain management have been identi"ed in
the literature: outsourcing of non-core activities to
suppliers [9,10]; focusing of operations [11,12];
a reduction in the supplier base as companies shift
from multiple to single sourcing [13,14]; and the
establishment of long-term collaborative relation-
ships with suppliers [1,15,16]. The outcome of
these changes is that companies are establishing
new forms of relationships with their suppliers.
The traditional buyer}supplier model prevalent
in British industry in the 1970s was based upon
adversarial, arms-length relations. Buyers tightly
de"ned production and process speci"cations.
Components were obtained from multiple sources.
Little information was disclosed to suppliers on
technologies, processes and projected production
targets [17]. Price competitiveness was the primary
criterion on which contracts were awarded.
Adversarial relations proved counterproductive
to both parties, and by the beginning of the 1980s
a partnership model was being adopted to reduce
costs, resolve scheduling problems and other tech-
nical di$culties. This strategic change was essential
if manufacturers were to implement total quality
principles embodying just-in-time manufacturing
techniques, minimum inventory, `right "rst timea
and Kaizen. The partnership, or obligational
model, is characterised by: close operational and
strategic linkages between buyer and supplier; the
provision of technical and managed assistance to
suppliers; and the establishment of preferred sup-
plier status or single sourcing agreements [18].
Some doubts have been expressed about how far
the obligational model has displaced the adver-
sarial model. Indeed, research suggests that the
adoption of these new practices tends to be piece-
meal, and not widespread in practice, but concen-
trated in speci"c sectors such as the automotive or
electronics industries [19]. Even within `leading-
edgea companies a number of constraints have
been identi"ed. For example, mistrust between
buyers and suppliers has been found to be preva-
lent [20]. There have been di$culties in establish-
ing tiered systems of component supply [21] and
problems in implementing JIT systems [22,23].
This suggests that the adoption and implementa-
tion of new obligational practices are far from wide-
spread. Indeed, in spite of the emphasis placed on
quality and delivery, price and cost are still the key
determinants of contract awards [19,23].
Outsourcing, in particular, poses a number of
challenges and opportunities for companies. There
are many strategic bene"ts of outsourcing to best-
in-class suppliers: greater #exibility in the purchase
of rapidly developing new technologies; a reduction
in design cycle times and higher quality. In addi-
tion, risks relating to contractual obligations, or
investments in research and development, may be
transferred to the supplier [10]. The inherent
danger is that a technology critical to competitive
success may be outsourced, leading to the loss of
`architectural knowledgea [24].
As a company increases the scope of its supply,
the proportion of the activities and resources that it
directly controls decreases. An alternative strategy
available to the company is to develop close collab-
orative relationships with its suppliers to extend the
boundary of the "rm and exert indirect control
over their resources. The growth in outsourcing
and the trend towards single sourcing has led
C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190 185
companies to strengthen their relationships with the
remaining suppliers. The strategic imperative for the
buyer is how to capture and integrate the technology
and knowledge of the supplier with the company's
own internal capabilities. There is evidence that in-
volving suppliers at an early stage in design and
product development improves quality, increases
productivity and reduces lead-time [25,26]. The sup-
pliers may also be an important source of innovation
in development of the product [27].
Researchers have also questioned the unequal
distribution of power in the new collaborative rela-
tions between buyers and suppliers. In many cases,
co-operation was underpinned by strong buyer
control, enforced through vetting and monitoring
[17]. In e!ect, the more powerful buyers simply
imposed terms and conditions on the weaker, de-
pendent suppliers [23]. The main weaknesses of
previous research on high-volume manufacturing,
especially in the automotive industry, is that it has
focused upon mass production of standardised
products, in repetitive and routine assembly pro-
cesses. These are normally controlled using JIT
systems that require close operational integration
between customers and suppliers. Research has
concentrated upon supply chains dominated by
a focal producer able to exert a signi"cant degree of
control over its much smaller suppliers [18]. This
situation does not hold for many of the
buyer}supplier relationships in ETO, low-volume
manufacture.
6. Supply chain management in ETO companies
In ETO companies, the relationships with sup-
pliers were found to vary considerably due to: dif-
fering levels of vertical integration; variations in
volume for di!erent types of components; the
degree of customisation of components; the level of
concurrent engineering activity; the value of the
item concerned; the proximity to the critical path;
and the power balance within the particular
buyer/supplier relationships. This variability
within, and across companies, means that caution
should be exercised in assessing the transferability
of supply chain management practices from the
high volume to the capital goods sector.
Multi-sourced adversarial trading is widespread
in ETO companies. This is characterised by
`win}losea transactions and mutual mistrust. Mul-
tiple sourcing constitutes a strategy for reducing
purchasing uncertainty [28]. However, ETO com-
panies recognise the importance of developing
a more collaborative approach to suppliers. This is
because bought-out items and services usually ac-
count for a large proportion of total contract value.
Attempts to shift towards collaborative relation-
ships are often frustrated by lack of trust due to
prolonged adversarial relationships. This situation
supports the view of Boyer [29] who identi"ed that
cultural constraints, the absence of trust and the
prevalence of opportunism were barriers to change
in buyer}supplier relationships.
Core activities can be interpreted in several ways
[9]. A core activity might be one that is: (a) tradi-
tionally performed internally; (b) critical to busi-
ness performance; (c) creating current or potential
competitive advantage; or (d) driving future
growth, innovation or rejuvenation of the enter-
prise. In the ETO sector, the interpretation ranges
across these possibilities. This is one of the reasons
why the level of vertical integration is varied. In the
highly vertically integrated companies, core activ-
ities of type (b) were prevalent. At the other ex-
treme, in the design and contract organisations,
core activities were of type (c).
The non-physical processes associated with ten-
dering, design and contract management are con-
sidered to be core capabilities in ETO companies.
This results in more attention being paid to prod-
uct capability and features than to design for manu-
facture or assembly. This results in increased cost
and excessive variety of components and subsys-
tems. Changing design through standardisation, as
well as understanding the product development
process [30], o!ers the potential for managing
design and reducing costs.
Large batch and #ow line production systems
generally exhibit the characteristics of standardisa-
tion of products, repetitive manufacturing and as-
sembly processes that are necessary to allowthe full
application of JIT techniques. For example, the
implementation of Kanban, as a method of produc-
tion scheduling, requires a steady-state #ow of
materials. However, techniques such as Cellular
186 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
Manufacturing, Total Quality Management and
inter-company JIT can be applied more widely.
Indeed ETO companies use cellular manufacturing
methods for items with su$cient volume and stab-
ility of demand. Implementations of Cellular
Manufacturing and associated team working initi-
atives involve considerable change in management
and workforce attitudes. There are several exam-
ples of the successful adoption of these approaches
in ETO companies. Statistical Quality Control is
often used in such situations but this is restricted to
batch and #ow processes. It is possible that many of
the features of inter-company JIT such as supplier
quality certi"cation and point of use delivery could
be of use in ETO manufacturing.
Bresnen [18] recognises that the majority of re-
search in supply chain management has focused on
particular industrial sectors, such as the auto-
motive industry. The model of a large-scale (hence
economically powerful) manufacturer supported by
smaller (economically weaker) suppliers, or sub-
contractors, that applies in the automotive industry
is often inappropriate in the ETO capital goods
sector. Power within supply chain relationships
may be biased toward the supplier, especially for
items required in low volumes, on an infrequent
basis. The value of the order may not be signi"cant
to the supplier. In some cases, the customer speci-
"es the type and source of supply of important
sub-systems. For example, a customer purchasing
material handling equipment may specify the
manufacturer and standard model for control sys-
tems. This is to minimise both the diversity of spare
parts and the requirement for operator training.
Another example of buyer dependence is in the
purchase of large, high-integrity forgings, or com-
plex castings used in power generation equipment.
In these cases, it is because there are few potential
suppliers.
7. Procurement in ETO companies
Procurement obtains the speci"cations for com-
ponents and sub-systems from the design function.
The e!ectiveness of procurement in the ETO envi-
ronment depends upon whether the speci"cations
are correct and appropriate. The level of detail
involved in the speci"cation of items is an impor-
tant issue. Functional speci"cations (what it will
do, rather than how it will do it) allow the suppliers
to develop their own designs, introduce innovation
and reduce costs [31]. Detailed technical speci"ca-
tions reduce the design choices available to the
supplier. This may constrain innovation and result
in unnecessary design and procurement activities,
which increase cost and lead-time. There is a tend-
ency for companies with current, or previous
manufacturing capability, to produce speci"cations
that are too detailed. Some important product fea-
tures that a!ect customer satisfaction may not be
explicitly speci"ed. For example, ease of mainten-
ance requires the designers to have knowledge of
the through-life costs and operating conditions of
the product. Outsourcing, if not carefully managed,
can lead to a `hollowing outa of the company
through loss of this `architectural knowledgea [24].
A challenge for ETO companies is to control design
and supply, by retaining the expertise to integrate
subsystem performance speci"cations to meet
stated and unstated customer requirements.
ETO companies make procurement decisions at
di!erent stages of product development. First, cus-
tomers may specify preferred suppliers, or present
detailed speci"cations that can only be satis"ed by
a limited number of suppliers. Second, components
and subsystems may be speci"ed at the tendering
stage and cannot be subsequently changed. These
decisions sometimes take place by default. De-
signers select items from suppliers' catalogues
based upon their functional characteristics, often
without regard to procurement or commercial im-
plications. Third, engineering design may specify
items during the detailed design process. This may
cause a delay in the availability of detailed speci-
"cations. Parts that have long lead-times should be
considered early in the design process. Special sup-
plier relations are required to handle the remaining
uncertainty in the exact speci"cation. Finally, when
standard parts are speci"ed, procurement may
respond to requirements at any stage. On the
other hand, there may be insu$cient constraints on
speci"cations at the early stages of design. For
example, if there is only limited re-use of engineer-
ing designs across orders unnecessary variety
can be introduced. This variety increases the
C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190 187
complexity of procurement and introduces uncer-
tainty and risk [32]. In general, the use of standard
designs allows sourcing decisions to be made later
[33].
ETO companies tend to have reactive procure-
ment functions that are departmentalised and
predominantly clerical in nature. Many sourcing
decisions are predetermined by either customer
speci"cations or early design decisions at the tender
stage. In many cases, companies use a lowest price
ordering strategy. This fails to recognise the bene-
"ts of creating partnerships, and the importance of
having fewer, more reliable vendors. Consequently,
the companies engage in continual vendor assess-
ment and goods inwards inspection, which is waste-
ful, time consuming and expensive.
To conclude, ETO companies are committing
costs through contractual agreements based upon
customer or internally generated speci"cations.
Burt and Doyle [34] identi"ed that 75}80% of
total avoidable cost is controllable at the design
stage. Hence, early, proactive involvement of pro-
curement in tendering and product design decisions
is essential to reduce costs. The variety and range of
speci"cations and the high proportion of contract
value that is outsourced by ETO companies strong-
ly suggests that procurement should be regarded as
strategic. In design and contract companies,
bought-out components account for more than
80% of total costs. A strategic view not only assigns
procurement operational signi"cance but makes it
part of the corporate planning process [35,36].
Matthyssens and Van den Bulte [37] suggest
that the procurement specialist needs to evolve into
a `supply strategista, whilst Spekman et al. [38]
propose that the procurement manager should be-
come an `information manager and manager of
external manufacturinga. This manager would have
responsibility throughout the supplier value chain
to gather knowledge about products, processes and
competition that could a!ect the "rm's competitive
position. Vaughan [39] develops this argument fur-
ther, suggesting that procurement should be viewed
as a strategic process in which the company as
a whole participates. He argues that the procure-
ment process in the capital goods industry should
be based on cross-functional, project-based teams.
The procurement specialist would act as an
`information and knowledge brokera, obtaining
knowledge about markets, competition and
innovation.
8. Conclusions
This paper has examined the characteristics of
a group of ETO companies engaged in the supply
of capital goods. These companies supply high
value, customised products, with deep and complex
product structure. Their business processes and
company structure are described in terms of verti-
cal integration, internal manufacturing processes
and outsourced supply. Company structures
ranged from vertically integrated businesses, that
had signi"cant manufacturing capability, to design
and contract organisations that outsourced all
physical activities.
There are three stages of interaction between
ETO companies and their customers. The "rst is
marketing, which provides an opportunity for the
ETO companies to identify market trends, tech-
nical, and non-technical customer requirements,
and customer criteria for assessing competing
o!ers. The second stage is tendering that involves
the preliminary development of the conceptual de-
sign and the de"nition of major components and
systems. A technical speci"cation, delivery sched-
ule, price and commercial terms are agreed.
75}80% of costs is committed at this stage. The
third stage takes place after a contract has been
awarded and includes non-physical processes, such
as design and planning, and physical processes as-
sociated with manufacturing, assembly and com-
missioning [7]. Supply chain management in ETO
companies involves the co-ordination of internal
processes across these three stages.
ETO companies span a continuum from a fully
integrated company that manufactures all compo-
nents and assemblies at one extreme, to a pure
design and contract organisation at the other. The
appropriate structure for a particular company is
dependent upon many factors including cost, capi-
tal available for equipment, potential utilisation
of plant, internal and external capabilities and #exi-
bility. These factors vary from "rm to "rm giving
rise to di!erent levels of vertical integration.
188 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
Supply chain management in the ETO sector is
considered in the context of trends in high-volume
manufacturing industry. These have included the
outsourcing of non-core activities, the focusing of
operations, a reduction in the supplier base and the
development of long-term collaborative relation-
ships [40]. Tendering, design and contract manage-
ment are considered to be core capabilities in ETO
companies. This often leads to more attention
being paid to product capability and features than
to design for manufacture or assembly. This results
in increased cost and excessive variety. In general,
the focusing of operations has led to a reduction in
the level of physical activity as manufacturing has
been outsourced. There have been some attempts
to reduce the supply base and move towards more
collaborative relationships. However, these were
often frustrated by a lack of trust due to long-
standing adversarial relationships. In many cases,
the development of partnerships were not justi"ed
due to the low volume and infrequent demand for
many items.
Procurement decisions take place at di!erent
stages of product development. Product subsystems
may be de"ned either by the customer, through
tender speci"cations, or by engineering design. In
general, the use of standardised con"gurations
allows sourcing decisions to be made later in the
overall process. The level of detail in speci"cations
was found an important issue that determined the
e!ectiveness of the procurement function. Func-
tional speci"cations allow suppliers to introduce in-
novation and reduce costs. Detailed technical
speci"cations constrain suppliers and increase cost
and lead-time. There is a tendency for companies
with current or previous manufacturing capability
to produce speci"cations that are too detailed.
From the analysis of business processes in ETO,
the ways in which procurement and its relation-
ships with other processes can be improved, have
been identi"ed. First, e!ective sharing of know-
ledge and information requires the use of common
databases that support tendering, design, procure-
ment, and project management. This requires
records of previous designs, standard components
and subsystems together with costing, planning,
vendor performance and sourcing information.
This knowledge is a key source of competitive
advantage for ETO companies. Second, limiting
customisation using modular con"gurations and
standard items provides more #exibility in the tim-
ing of procurement decisions, as well as reducing
costs and lead-times. This approach also gives
higher quality planning data earlier. Third, proac-
tive procurement implies participation in the devel-
opment of speci"cations. This requires technical
liaison with tendering and design based upon
knowledge of potential vendor capabilities and per-
formance. This infrastructure is necessary to make
supply chain management strategic in ETO com-
panies.
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doc_882087921.pdf
Companies in all sectors are examining ways to reduce costs, shorten product development times and manage risk. The transactions between companies in supply chains are characterised by adding value up through the chain and incurring costs (and consequent payments) down the chain.
Int. J. Production Economics 65 (2000) 179}190
Supply chain management: A strategic issue in engineer to order
manufacturing
C. Hicks*, T. McGovern, C.F. Earl
Department of Mechanical, Materials and Manufacturing Engineering, University of Newcastle, Stephenson Building, Newcastle upon Tyne,
NE1 7RU, UK
School of Management, University of Newcastle upon Tyne, Newcastle upon Tyne, UK
Received 13 May 1997; accepted 1 February 1999
Abstract
The characteristics of Engineer to Order (ETO) companies are described in terms of their markets, products and the
internal processes of their organisation. These are set in the context of current trends in supply chain management. The
business processes associated with the procurement and marketing functions and the interactions with other processes
are analysed. These are compared for a number of di!erent types of ETO company. The variety of work in ETO projects,
the customised, complex products and the underlying uncertainties of markets all indicate that procurement and
marketing need to be integrated with other processes, particularly tendering and design. These characteristics put
constraints on the application of established supply chain management methods. It is argued that a strategic view of
supply chain management in which procurement makes a greater contribution in the tendering and early product
development activities has the potential to improve performance. 2000 Elsevier Science B.V. All rights reserved.
Keywords: Supply chain management; Engineer to order; Business processes; Strategy
1. Introduction
Companies in all sectors are examining ways to
reduce costs, shorten product development times
and manage risk. The transactions between com-
panies in supply chains are characterised by adding
value up through the chain and incurring costs (and
consequent payments) down the chain. Supply
chain management aims to reduce costs, risk and
lead-times associated with these transactions, thus
releasing value. There is limited research into sup-
ply chain management in the low-volume Engineer
to Order (ETO) sector. This is in contrast to the
*Corresponding author.
extensive literature on the high-volume sector, par-
ticularly automotive and electronics [1,2].
This paper examines how the special nature of
the ETO business constrains the application of
supply chain methodologies. The characteristics of
ETO companies and associated supply chain man-
agement issues were derived from studies of ETO
companies involved in the design, manufacture and
construction of capital equipment for the power,
materials handling and o!shore industries. The re-
search focused on modelling business processes,
planning and control, analysis of speci"cations and
supply chain management.
A business process approach to describing ETO
companies was adopted. This helps to identify the
0925-5273/00/$- see front matter 2000 Elsevier Science B.V. All rights reserved.
PII: S 0 9 2 5 - 5 2 7 3 ( 9 9 ) 0 0 0 2 6 - 2
Table 1
Collaborating ETO companies and their products
Company Turnover Employees Products Typical order
(Cm)
Customisation Depth of
product
structure
A 200 800 Steam turbine-generators 50}300 High Deep
B 200 3500 Oil platforms 20}25 High Deep
C 75 400 Power station boilers 50 High Deep
D 125 100 Mechanical handling 20 High Deep
E 25 50 Mechanical handling 10 High Deep
F 25 100 Electronic control systems 3 High Medium
G 150 600 Switchgear 50}100 Low Medium
Company also project manages power station contracts. This business has a high level of outsourcing as the company only
manufactures turbine generators.
Customisation: Low } mainly standard products, Medium } customised options, High } engineer to order.
Depth of product structure: Shallow } 1 to 3 levels, Medium } 3 to 6 levels, Deep } '6 levels.
nature of relationships between customers and sup-
pliers. These are particularly complex in ETO busi-
nesses, which are involved in many di!erent types
of supplier relationships. A systems modelling ap-
proach to representing this complexity is reported
elsewhere [3]. The ways that internal organisation
and structure constrain the role of supply chain
management in ETO companies are considered.
The paper does not investigate in any detail the
consequent issues of supply chain relationships, but
rather identi"es the environment in which these
relationships are established and maintained. Pro-
curement decisions in ETO companies are analysed
from an operational and strategic perspective.
2. Description of ETO companies
The research was conducted in collaboration
with seven companies in the power generation,
high-integrity materials handling and o!shore sec-
tors. The main business activities of the companies
are the design, manufacture and construction of
capital equipment. A summary of the character-
istics of the collaborating companies and their
products is shown in Table 1.
Companies A, B, Dand G are the largest in terms
of turnover and number of employees. For all the
companies except company F, each order is a large
proportion of annual turnover and is therefore of
strategic importance. A}F are ETO companies that
supply highly customised products to meet indi-
vidual customer requirements. Company G has
high value orders but these are typically for over 10
units. It has a standardised range of products that
are con"gured to meet a broad range of national
and international electrical distribution require-
ments. They are supplied on a make to order basis.
Companies A}E produce products with complex
and deep product structures whilst companies
F and G produce less complicated items with
a shallower product structure.
A summary of the collaborating companies and
their business processes is provided in Table 2. All
of the companies have design and project manage-
ment capabilities. These are considered to be core
competencies in all cases. Companies A}D also
perform manufacturing, factory-based assembly,
construction and commissioning at customers'
sites. Company E produces similar products to
company D but is much smaller in terms of turn-
over and numbers employed. It only has a design
and project management capability as all other
activities are outsourced. Company F produces
electronic control systems, which are designed to
meet individual customer requirements and are as-
sembled from generic electronic components. The
company installs and commissions its equipment at
customers' sites. Company G has a strong design
capability, but in general, products are developed
180 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
Table 2
Processes in collaborating companies
Company Processes Manufacturing
processes
Vertical
integration
A DPMACC JBFA High
B DPMACC JBA High
C DPMACC JBA High
D DPMACC JBA Medium
E DP None Low
F DPACC A Low
G DPMACC JBA High
Processes: D } design, P } project management, M } manufac-
turing, A } assembly, CC } construction and commissioning.
Manufacturing processes: J } jobbing, B } batch, F } #ow,
A } assembly.
Table 3
Supply chain management in collaborating companies
Company Outsourcing Supplier base Strategic
alliances
Partnership
agreements
Single
sourcing
agreements
A Extensive Reduced Yes Some No
B Extensive Reduced Yes Yes No
C Extensive Reduced No No No
D Extensive Diverse No No No
E All physical processes Diverse No No No
F All manufacturing Diverse No No No
G Extensive Reduced No No No
to meet the requirements of regional markets rather
than individual customers. The company has a wide
range of manufacturing and assembly processes and
installs and commissions its equipment on site.
Company A has the widest range of manufactur-
ing capability which includes jobbing, batch, #ow
and assembly processes and a wide range of manu-
facturing technologies. Fabrication of complex
structures is the main manufacturing activity for
companies B and C. This involves jobbing, batch
and assembly processes. Company D has a signi"-
cant fabrication capability, but it also produces
a wide range of mechanical components. It has
a range of jobbing, batch and assembly processes.
Company F does not manufacture components
and only performs assembly activities. Finally,
company G has a wide range of manufacturing
technologies ranging from steel pressing through
to electrical assembly and testing. These include
jobbing, batch and assembly processes.
The level of vertical integration and outsourcing
varies considerably within this group of companies.
It can be seen that companies A, B, C and G are
highly vertically integrated with substantial manu-
facturing capabilities. These companies manufac-
ture most of their products in-house, but outsource
standard components and systems. The level of
outsourcing is greater for company B as it produces
structural components but outsources all mechan-
ical systems. Company D, although having some
manufacturing capability, is less vertically integ-
rated than companies A, B and C. It is, therefore,
more dependent upon outsourced items. Com-
panies E and F are not vertically integrated and are
therefore more dependent upon their suppliers.
Table 3 shows some of the characteristics of
supply chain management in the collaborating
companies. It can be seen that all of the companies
are highly dependent upon outsourcing. This is
particularly so for company E which outsources all
of its physical activities and company F that only
performs assembly, construction and commission-
ing activities. Companies A}C and G have reduced
their supplier base whereas companies D, E and
F still have a large number of suppliers. Companies
A and B have established strategic alliances with
their customers and suppliers. Company B, in par-
ticular, has derived substantial competitive advant-
age from this approach. Only companies A and B
have formal partnership agreements with their sup-
pliers, but these are not single sourcing agreements.
C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190 181
The ETO sector encompasses many types of com-
pany, designing and manufacturing a diverse range
of products. Individual products are generally highly
customised to meet individual customer require-
ments and are produced in low volume on an engin-
eer, or make to order basis. The main products have
deep and complex product structures that give rise
to many levels of assembly process. They contain
a diversity of components, some of which are re-
quired in very low volume, whereas others are re-
quired in medium or large quantities. Certain
components and systems are highly customised
whilst others are standardised. Some components
such as the control systems are technologically ad-
vanced whereas other items such as structural steel-
work are not. In general, high levels of customisation
lead to increased costs, higher risks and long lead-
times. It also makes outsourcing more di$cult as
component and subsystems requirements are only
fully speci"ed after the design process has taken
place. Most of the companies have recognised these
di$culties and are trying to increase design standar-
disation based upon modular design principles. In
many cases, this approach has proved di$cult due
to diverse customer requirements. Many designers
also have a strong desire to produce creative cus-
tomised solutions.
3. Business processes in ETO companies
For the purposes of describing the business pro-
cesses within ETO companies we decompose the
complex processes of interaction with customers
and suppliers into three stages. The "rst stage is
marketing, which is a two-way process that devel-
ops potential customers' awareness of the company
and its products. It provides an opportunity for the
ETO company to identify market trends, technical
and non-technical customer requirements, as well
as the customer's criteria for assessing competing
o!ers. It is based upon relationship marketing [4].
Decisions on whether an invitation to tender is
worth responding to are made at this stage. These
are based upon an assessment of customer require-
ments, commercial factors, the company's ability to
compete and the likelihood of success. Where the
markets for major products are in decline, the
marketing activity may include identifying new
business opportunities that can be exploited using
existing expertise and resources. Over the last dec-
ade, the nature and signi"cance of the marketing
function has changed in the collaborating com-
panies. It is now strategic. The privatisation of the
electricity supply industry has transformed the
competitive environment for companies A, C,
F and G. The decline in the oil price, the shift
towards smaller oil "elds, and the globalisation of
the industry has had a similar e!ect on company B.
The second stage is the response to an invitation
to tender for a particular contract. The tender in-
volves the preliminary development of the concep-
tual design and the de"nition of major components
and systems. Contact with selected suppliers is
made at this stage to obtain information on costs
and lead-times. There are often a number of phases
of negotiation with suppliers that aim to match
overall project cost and lead-time with anticipated
customer and market requirements. A technical
speci"cation, delivery terms, price and commercial
terms are agreed at this stage. This represents a
major commitment. Success requires a detailed
understanding of customer needs including tech-
nical features, price, delivery and quality require-
ments. This would imply the need for a strategy
based upon customer intimacy [5]. Konijnendijk
[6] reported that the tendering success rate is often
less than 30%. Research with our collaborating
companies indicates that the strike rate is often
lower.
The third stage takes place after a contract has
been awarded. Initial activities are non-physical [7]
including the development of an overall project
plan and detailed design. This is followed by pro-
curement, then the physical processes associated
with component manufacturing, assembly,
construction and commissioning. The level of
involvement by the company itself in these physical
activities varies from company to company and is
dependent on the level of vertical integration. As in
other sectors, ETO companies are reducing the
degree of vertical integration as they increasingly
rely on outsourcing [8]. The interaction of pro-
cesses within these three stages will emerge as an
important aspect of our analysis of supply chain
management.
182 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
ETO companies respond to their markets in
unique ways [6]. The product range is mostly
based upon previous orders. Product innovation
may be general, such as developing an underlying
technology, or it may be speci"c to meeting the
requirements of a particular customer or order.
Medium- and long-term planning is usually based
upon aggregated information expressed in terms of
value or labour content. Typically a yearly sales
plan co-ordinates marketing and manufacturing
requirements. Decisions to outsource manufacture
are often taken at this level. Delivery dates in ten-
ders are based on lead-time estimates. These are
usually produced without information on available
capacity, as it is common for there to be several
`#oatinga quotations awaiting responses from
potential customers. Detailed speci"cations that
determine work content and duration are also
uncertain at this stage. It is, therefore, necessary to
reconsider the lead-times and delivery dates at the
order acceptance stage and to con"rm arrange-
ments with the customer. It may also be necessary
to review outsourcing decisions at this stage.
A key competitive factor in ETO markets is
delivery performance. Improving performance has
two components: reducing lead-time and increasing
the reliability of lead-time estimates. Lead-time re-
duction has been achieved by shortening the dura-
tion of individual processes and by increasing the
overlapping of previously sequential activities. Im-
provements in technology such as the application
of large multifunction machine tools can reduce
process times and improve dimensional accuracy.
This in turn reduces assembly times and their varia-
bility. Improvements in software support including
computer aided manufacturing (CAM), computer
aided production management (CAPM) systems,
computer aided design (CAD) enable faster
response, better planning and facilitate product
innovation. Concurrent engineering methods pro-
mote design for manufacturing and assembly as
well as the overlapping of these activities. Unex-
pected redesign and unnecessarily complex manu-
facture are avoided, thus giving more reliable lead-
time estimates. Delivery performance can also be
improved by streamlining products and processes
through modularity and standardisation. This may
be driven by the customer seeking familiar product
features and a minimum diversity of spare parts,
or by the supplier's desire to minimise costs and
complexity.
The ETO sector is characterised by a large
design content per order, the types of products
produced, the business processes and the nature of
the markets. Before proceeding to discuss how
these a!ect supply chain management in ETO com-
panies, di!erent approaches to vertical integration
within the sector are considered. Vertical integra-
tion is particularly relevant as it is a variable feature
in ETO organisations and a!ects the level and type
of outsourcing.
4. Vertical integration
The research undertaken has shown that ETO
companies can be classi"ed according to the level of
vertical integration. They span a continuum from
in-house manufacture of all components and as-
semblies at one extreme, to a pure design and
contract organisation at the other. Furthermore,
two types of design and contract business can be
identi"ed. In the "rst type, all items from suppliers
are delivered to site and the ETO company carries
out the construction and commissioning phase of
the work. In the second type, all physical activities
are undertaken by either suppliers or subcontrac-
tors. Only marketing, design, procurement and
project management are performed internally.
In considering the appropriate level of vertical
integration, ETO companies seek an optimum
response to a number of factors. These include:
reconciling customer delivery times with available
capacity; reducing costs; the availability of capital
for investment in equipment; potential utilisation of
plant; internal and external capabilities and #exibil-
ity. These factors vary from "rm to "rm giving rise
to di!ering levels of vertical integration. This varia-
bility makes it di$cult to prescribe best practice for
supply chain management in ETO companies. Our
observations on ETO companies suggest that there
has been a trend towards vertical disintegration
driven by "nancial pressures and the need for cost
reduction. Vertical disintegration can increase #ex-
ibility by making alternative product con"gura-
tions possible, but it can also reduce the scope of
C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190 183
Fig. 1. Vertically integrated ETO company.
concurrent engineering and the #exibility to deal
with design changes.
Fig. 1 illustrates the manufacturing processes
performed by a vertically integrated ETO com-
pany. The company produces, in low volumes,
a main product that has a deep product structure.
This typically consists of a number of major sub-
assemblies that have medium levels of product
structure that are delivered to the customer's site
for "nal assembly. These subassemblies are produc-
ed from a range of components that are manufac-
tured using jobbing, batch and #ow processes. An
example would be a large steam turbine generator.
The high-pressure, intermediate and low-pressure
turbines and the generator are delivered to site for
"nal construction and commissioning. The turbine
units consist of a turbine rotor and four turbine
casings that are produced in low volume on a job-
bing basis, together with several hundred blades
that are manufactured on a batch production basis.
The generator has components, such as the rotor
and the core frame, that are produced on a jobbing
basis, with some components (for example, the con-
ductor bars) that are required in intermediate
quantities. These are produced in batches. Each
generator also includes several hundred thousand
core plate laminations that are manufactured using
a dedicated #ow line.
The model in Fig. 1 above shows that the busi-
ness activities of ETO companies are more complex
than suggested by Tables 1 and 2. A service and
spare parts business supplies items with shallow
product structures. In some cases, additional busi-
ness activities have been developed to exploit ex-
pertise or to increase the utilisation of resources.
The main product and spares businesses tend to be
pro"t generators with the additional businesses
generating cash during times of low demand for the
major product. The spares and subcontract engin-
eering activities involve the jobbing and batch
production of components with shallow product
structure. For the main product, di!erent types of
manufacturing processes need to be co-ordinated
with common assembly and construction activities.
Fig. 1 describes the general structure of manufac-
turing activities undertaken by the vertically integ-
rated companies A, B, C, D and G.
The approach to the outsourcing of manufactur-
ing activities varies from "rm to "rm. A common
approach has been to concentrate on assembly
184 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
processes, as these are considered to result in high
levels of added value. Some companies have also
retained jobbing processes when manufacturing
technologies, or other capabilities, provide com-
petitive advantage. In some cases, such as the pro-
duction of large heavy components, in-house
manufacturing capability is necessary due to a lack
of potential suppliers. At the other extreme, some
ETO companies have outsourced all manufactur-
ing, assembly, construction and commissioning ac-
tivities as a mechanism for minimising overhead
costs.
In general, there has been an increase in out-
sourcing by ETO companies. This makes supply
chain management strategically important, because
of the reliance upon suppliers for technology,
design and manufacture. The next two sections
compare the ways that supply chain management is
addressed by companies in the high- and low-
volume sectors.
5. Supply chain management trends in high-volume
industries
In the high-volume industries, four key trends in
supply chain management have been identi"ed in
the literature: outsourcing of non-core activities to
suppliers [9,10]; focusing of operations [11,12];
a reduction in the supplier base as companies shift
from multiple to single sourcing [13,14]; and the
establishment of long-term collaborative relation-
ships with suppliers [1,15,16]. The outcome of
these changes is that companies are establishing
new forms of relationships with their suppliers.
The traditional buyer}supplier model prevalent
in British industry in the 1970s was based upon
adversarial, arms-length relations. Buyers tightly
de"ned production and process speci"cations.
Components were obtained from multiple sources.
Little information was disclosed to suppliers on
technologies, processes and projected production
targets [17]. Price competitiveness was the primary
criterion on which contracts were awarded.
Adversarial relations proved counterproductive
to both parties, and by the beginning of the 1980s
a partnership model was being adopted to reduce
costs, resolve scheduling problems and other tech-
nical di$culties. This strategic change was essential
if manufacturers were to implement total quality
principles embodying just-in-time manufacturing
techniques, minimum inventory, `right "rst timea
and Kaizen. The partnership, or obligational
model, is characterised by: close operational and
strategic linkages between buyer and supplier; the
provision of technical and managed assistance to
suppliers; and the establishment of preferred sup-
plier status or single sourcing agreements [18].
Some doubts have been expressed about how far
the obligational model has displaced the adver-
sarial model. Indeed, research suggests that the
adoption of these new practices tends to be piece-
meal, and not widespread in practice, but concen-
trated in speci"c sectors such as the automotive or
electronics industries [19]. Even within `leading-
edgea companies a number of constraints have
been identi"ed. For example, mistrust between
buyers and suppliers has been found to be preva-
lent [20]. There have been di$culties in establish-
ing tiered systems of component supply [21] and
problems in implementing JIT systems [22,23].
This suggests that the adoption and implementa-
tion of new obligational practices are far from wide-
spread. Indeed, in spite of the emphasis placed on
quality and delivery, price and cost are still the key
determinants of contract awards [19,23].
Outsourcing, in particular, poses a number of
challenges and opportunities for companies. There
are many strategic bene"ts of outsourcing to best-
in-class suppliers: greater #exibility in the purchase
of rapidly developing new technologies; a reduction
in design cycle times and higher quality. In addi-
tion, risks relating to contractual obligations, or
investments in research and development, may be
transferred to the supplier [10]. The inherent
danger is that a technology critical to competitive
success may be outsourced, leading to the loss of
`architectural knowledgea [24].
As a company increases the scope of its supply,
the proportion of the activities and resources that it
directly controls decreases. An alternative strategy
available to the company is to develop close collab-
orative relationships with its suppliers to extend the
boundary of the "rm and exert indirect control
over their resources. The growth in outsourcing
and the trend towards single sourcing has led
C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190 185
companies to strengthen their relationships with the
remaining suppliers. The strategic imperative for the
buyer is how to capture and integrate the technology
and knowledge of the supplier with the company's
own internal capabilities. There is evidence that in-
volving suppliers at an early stage in design and
product development improves quality, increases
productivity and reduces lead-time [25,26]. The sup-
pliers may also be an important source of innovation
in development of the product [27].
Researchers have also questioned the unequal
distribution of power in the new collaborative rela-
tions between buyers and suppliers. In many cases,
co-operation was underpinned by strong buyer
control, enforced through vetting and monitoring
[17]. In e!ect, the more powerful buyers simply
imposed terms and conditions on the weaker, de-
pendent suppliers [23]. The main weaknesses of
previous research on high-volume manufacturing,
especially in the automotive industry, is that it has
focused upon mass production of standardised
products, in repetitive and routine assembly pro-
cesses. These are normally controlled using JIT
systems that require close operational integration
between customers and suppliers. Research has
concentrated upon supply chains dominated by
a focal producer able to exert a signi"cant degree of
control over its much smaller suppliers [18]. This
situation does not hold for many of the
buyer}supplier relationships in ETO, low-volume
manufacture.
6. Supply chain management in ETO companies
In ETO companies, the relationships with sup-
pliers were found to vary considerably due to: dif-
fering levels of vertical integration; variations in
volume for di!erent types of components; the
degree of customisation of components; the level of
concurrent engineering activity; the value of the
item concerned; the proximity to the critical path;
and the power balance within the particular
buyer/supplier relationships. This variability
within, and across companies, means that caution
should be exercised in assessing the transferability
of supply chain management practices from the
high volume to the capital goods sector.
Multi-sourced adversarial trading is widespread
in ETO companies. This is characterised by
`win}losea transactions and mutual mistrust. Mul-
tiple sourcing constitutes a strategy for reducing
purchasing uncertainty [28]. However, ETO com-
panies recognise the importance of developing
a more collaborative approach to suppliers. This is
because bought-out items and services usually ac-
count for a large proportion of total contract value.
Attempts to shift towards collaborative relation-
ships are often frustrated by lack of trust due to
prolonged adversarial relationships. This situation
supports the view of Boyer [29] who identi"ed that
cultural constraints, the absence of trust and the
prevalence of opportunism were barriers to change
in buyer}supplier relationships.
Core activities can be interpreted in several ways
[9]. A core activity might be one that is: (a) tradi-
tionally performed internally; (b) critical to busi-
ness performance; (c) creating current or potential
competitive advantage; or (d) driving future
growth, innovation or rejuvenation of the enter-
prise. In the ETO sector, the interpretation ranges
across these possibilities. This is one of the reasons
why the level of vertical integration is varied. In the
highly vertically integrated companies, core activ-
ities of type (b) were prevalent. At the other ex-
treme, in the design and contract organisations,
core activities were of type (c).
The non-physical processes associated with ten-
dering, design and contract management are con-
sidered to be core capabilities in ETO companies.
This results in more attention being paid to prod-
uct capability and features than to design for manu-
facture or assembly. This results in increased cost
and excessive variety of components and subsys-
tems. Changing design through standardisation, as
well as understanding the product development
process [30], o!ers the potential for managing
design and reducing costs.
Large batch and #ow line production systems
generally exhibit the characteristics of standardisa-
tion of products, repetitive manufacturing and as-
sembly processes that are necessary to allowthe full
application of JIT techniques. For example, the
implementation of Kanban, as a method of produc-
tion scheduling, requires a steady-state #ow of
materials. However, techniques such as Cellular
186 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
Manufacturing, Total Quality Management and
inter-company JIT can be applied more widely.
Indeed ETO companies use cellular manufacturing
methods for items with su$cient volume and stab-
ility of demand. Implementations of Cellular
Manufacturing and associated team working initi-
atives involve considerable change in management
and workforce attitudes. There are several exam-
ples of the successful adoption of these approaches
in ETO companies. Statistical Quality Control is
often used in such situations but this is restricted to
batch and #ow processes. It is possible that many of
the features of inter-company JIT such as supplier
quality certi"cation and point of use delivery could
be of use in ETO manufacturing.
Bresnen [18] recognises that the majority of re-
search in supply chain management has focused on
particular industrial sectors, such as the auto-
motive industry. The model of a large-scale (hence
economically powerful) manufacturer supported by
smaller (economically weaker) suppliers, or sub-
contractors, that applies in the automotive industry
is often inappropriate in the ETO capital goods
sector. Power within supply chain relationships
may be biased toward the supplier, especially for
items required in low volumes, on an infrequent
basis. The value of the order may not be signi"cant
to the supplier. In some cases, the customer speci-
"es the type and source of supply of important
sub-systems. For example, a customer purchasing
material handling equipment may specify the
manufacturer and standard model for control sys-
tems. This is to minimise both the diversity of spare
parts and the requirement for operator training.
Another example of buyer dependence is in the
purchase of large, high-integrity forgings, or com-
plex castings used in power generation equipment.
In these cases, it is because there are few potential
suppliers.
7. Procurement in ETO companies
Procurement obtains the speci"cations for com-
ponents and sub-systems from the design function.
The e!ectiveness of procurement in the ETO envi-
ronment depends upon whether the speci"cations
are correct and appropriate. The level of detail
involved in the speci"cation of items is an impor-
tant issue. Functional speci"cations (what it will
do, rather than how it will do it) allow the suppliers
to develop their own designs, introduce innovation
and reduce costs [31]. Detailed technical speci"ca-
tions reduce the design choices available to the
supplier. This may constrain innovation and result
in unnecessary design and procurement activities,
which increase cost and lead-time. There is a tend-
ency for companies with current, or previous
manufacturing capability, to produce speci"cations
that are too detailed. Some important product fea-
tures that a!ect customer satisfaction may not be
explicitly speci"ed. For example, ease of mainten-
ance requires the designers to have knowledge of
the through-life costs and operating conditions of
the product. Outsourcing, if not carefully managed,
can lead to a `hollowing outa of the company
through loss of this `architectural knowledgea [24].
A challenge for ETO companies is to control design
and supply, by retaining the expertise to integrate
subsystem performance speci"cations to meet
stated and unstated customer requirements.
ETO companies make procurement decisions at
di!erent stages of product development. First, cus-
tomers may specify preferred suppliers, or present
detailed speci"cations that can only be satis"ed by
a limited number of suppliers. Second, components
and subsystems may be speci"ed at the tendering
stage and cannot be subsequently changed. These
decisions sometimes take place by default. De-
signers select items from suppliers' catalogues
based upon their functional characteristics, often
without regard to procurement or commercial im-
plications. Third, engineering design may specify
items during the detailed design process. This may
cause a delay in the availability of detailed speci-
"cations. Parts that have long lead-times should be
considered early in the design process. Special sup-
plier relations are required to handle the remaining
uncertainty in the exact speci"cation. Finally, when
standard parts are speci"ed, procurement may
respond to requirements at any stage. On the
other hand, there may be insu$cient constraints on
speci"cations at the early stages of design. For
example, if there is only limited re-use of engineer-
ing designs across orders unnecessary variety
can be introduced. This variety increases the
C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190 187
complexity of procurement and introduces uncer-
tainty and risk [32]. In general, the use of standard
designs allows sourcing decisions to be made later
[33].
ETO companies tend to have reactive procure-
ment functions that are departmentalised and
predominantly clerical in nature. Many sourcing
decisions are predetermined by either customer
speci"cations or early design decisions at the tender
stage. In many cases, companies use a lowest price
ordering strategy. This fails to recognise the bene-
"ts of creating partnerships, and the importance of
having fewer, more reliable vendors. Consequently,
the companies engage in continual vendor assess-
ment and goods inwards inspection, which is waste-
ful, time consuming and expensive.
To conclude, ETO companies are committing
costs through contractual agreements based upon
customer or internally generated speci"cations.
Burt and Doyle [34] identi"ed that 75}80% of
total avoidable cost is controllable at the design
stage. Hence, early, proactive involvement of pro-
curement in tendering and product design decisions
is essential to reduce costs. The variety and range of
speci"cations and the high proportion of contract
value that is outsourced by ETO companies strong-
ly suggests that procurement should be regarded as
strategic. In design and contract companies,
bought-out components account for more than
80% of total costs. A strategic view not only assigns
procurement operational signi"cance but makes it
part of the corporate planning process [35,36].
Matthyssens and Van den Bulte [37] suggest
that the procurement specialist needs to evolve into
a `supply strategista, whilst Spekman et al. [38]
propose that the procurement manager should be-
come an `information manager and manager of
external manufacturinga. This manager would have
responsibility throughout the supplier value chain
to gather knowledge about products, processes and
competition that could a!ect the "rm's competitive
position. Vaughan [39] develops this argument fur-
ther, suggesting that procurement should be viewed
as a strategic process in which the company as
a whole participates. He argues that the procure-
ment process in the capital goods industry should
be based on cross-functional, project-based teams.
The procurement specialist would act as an
`information and knowledge brokera, obtaining
knowledge about markets, competition and
innovation.
8. Conclusions
This paper has examined the characteristics of
a group of ETO companies engaged in the supply
of capital goods. These companies supply high
value, customised products, with deep and complex
product structure. Their business processes and
company structure are described in terms of verti-
cal integration, internal manufacturing processes
and outsourced supply. Company structures
ranged from vertically integrated businesses, that
had signi"cant manufacturing capability, to design
and contract organisations that outsourced all
physical activities.
There are three stages of interaction between
ETO companies and their customers. The "rst is
marketing, which provides an opportunity for the
ETO companies to identify market trends, tech-
nical, and non-technical customer requirements,
and customer criteria for assessing competing
o!ers. The second stage is tendering that involves
the preliminary development of the conceptual de-
sign and the de"nition of major components and
systems. A technical speci"cation, delivery sched-
ule, price and commercial terms are agreed.
75}80% of costs is committed at this stage. The
third stage takes place after a contract has been
awarded and includes non-physical processes, such
as design and planning, and physical processes as-
sociated with manufacturing, assembly and com-
missioning [7]. Supply chain management in ETO
companies involves the co-ordination of internal
processes across these three stages.
ETO companies span a continuum from a fully
integrated company that manufactures all compo-
nents and assemblies at one extreme, to a pure
design and contract organisation at the other. The
appropriate structure for a particular company is
dependent upon many factors including cost, capi-
tal available for equipment, potential utilisation
of plant, internal and external capabilities and #exi-
bility. These factors vary from "rm to "rm giving
rise to di!erent levels of vertical integration.
188 C. Hicks et al. / Int. J. Production Economics 65 (2000) 179}190
Supply chain management in the ETO sector is
considered in the context of trends in high-volume
manufacturing industry. These have included the
outsourcing of non-core activities, the focusing of
operations, a reduction in the supplier base and the
development of long-term collaborative relation-
ships [40]. Tendering, design and contract manage-
ment are considered to be core capabilities in ETO
companies. This often leads to more attention
being paid to product capability and features than
to design for manufacture or assembly. This results
in increased cost and excessive variety. In general,
the focusing of operations has led to a reduction in
the level of physical activity as manufacturing has
been outsourced. There have been some attempts
to reduce the supply base and move towards more
collaborative relationships. However, these were
often frustrated by a lack of trust due to long-
standing adversarial relationships. In many cases,
the development of partnerships were not justi"ed
due to the low volume and infrequent demand for
many items.
Procurement decisions take place at di!erent
stages of product development. Product subsystems
may be de"ned either by the customer, through
tender speci"cations, or by engineering design. In
general, the use of standardised con"gurations
allows sourcing decisions to be made later in the
overall process. The level of detail in speci"cations
was found an important issue that determined the
e!ectiveness of the procurement function. Func-
tional speci"cations allow suppliers to introduce in-
novation and reduce costs. Detailed technical
speci"cations constrain suppliers and increase cost
and lead-time. There is a tendency for companies
with current or previous manufacturing capability
to produce speci"cations that are too detailed.
From the analysis of business processes in ETO,
the ways in which procurement and its relation-
ships with other processes can be improved, have
been identi"ed. First, e!ective sharing of know-
ledge and information requires the use of common
databases that support tendering, design, procure-
ment, and project management. This requires
records of previous designs, standard components
and subsystems together with costing, planning,
vendor performance and sourcing information.
This knowledge is a key source of competitive
advantage for ETO companies. Second, limiting
customisation using modular con"gurations and
standard items provides more #exibility in the tim-
ing of procurement decisions, as well as reducing
costs and lead-times. This approach also gives
higher quality planning data earlier. Third, proac-
tive procurement implies participation in the devel-
opment of speci"cations. This requires technical
liaison with tendering and design based upon
knowledge of potential vendor capabilities and per-
formance. This infrastructure is necessary to make
supply chain management strategic in ETO com-
panies.
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