Project Scheduling

Description
This is a presentation desdribes scheduling requirements, scheduling approach, scheduling and control functions at manufacturing firm.

PROJECT SCHEDULING

TANEJA ENTERPRISE

AT

FLOW OF PRESENTATION
1. INTRODUCTION
2. Process Analysis 3. Why Scheduling is required?

4. Scheduling Requirements
5. Scheduling Approach 6. Scheduling & Control functions 7. Gantt Chart 8. Performance measure calculations

9. Suggestions

TANEJA ENTERPRISE
•Started in 1990 •Rubber Products manufacturer •Produces on “Made-to-order” basis •Major Customers include: •Maruti Udyog Ltd. •Hero Honda Ltd. •Remsons Industries •Deepak Auto Ltd. •Suprajit Engg Ltd.

MANUFACTURING PROCESS

PROCESS FLOW DIAGRAM
RAW MATERIAL STORAGE PRODUCT COLLECTED IN BINS
INSPECTED VISUAL AND QUALITY CHECKED KNEADING BY KNEADER MACHINE
NO

IS THE SAMPLE AS PER REQMNT ?

BINS FOR STORAGE

DISPOSE
YES

STORED IN BINS

ROLLED BY 2 ROLL MIXER SECOND ROUND OF INSPECTION

SHEETS CUT TO SMALLER PIECES
NO

LAID ON TABLE FOR COOLING

DISPOSE
YES

IS THE PIECE MEETING REQMNTS?

MOULDING BY HYDRAULIC PRESS

COLLECTED

PACKAGED

STAGE 1: PROCURING RAW MATERIAL
CHEMICALS
RUBBER

Neoprene Nitrile Synthetic rubber Silicon rubber JSR KSR

Carbon 550 Magnesium Oxide Poly Vinyl Chloride Steric Carbyl Acid Zinc Oxide Sulphur ZDBC

Mixing

STAGE 2: MIXING OF RAW MATERIAL
•A KNEADER MACHINE IS USED TO MIX THE RAW MATERIALS •The temperature and time of the kneader machine is set according to the grade of rubber to be produced. •For example, EPDM requires 3565 C for 7 minutes.

•The mixture is then temporarily stored in the baskets until further processing is done.

STAGE 3: TRANSFORMATION TO SHEETS

A Double Rolling Machine is used for this purpose. It uses cold rolling to flatten the rubber. These sheets are then cooled on long table.

STAGE 4: MOULDING
HAND MOULDING MACHINE MOULDING

STAGE 5: FINISHING, INSPECTION AND PACKAGING
FINISHING: 2 ROUNDS Once done at the factory. Then the products are sent to an outsourced location where second round of inspection is carried out. INSPECTION The various products formed are subjected to quality improvement tests. The standards of qualifying are set by the customer. PACKAGING Packaging is not done at the factory. The place of packaging is around 3 kilometers from the factory. A considerable amount is paid as rent per day for this place. Packets of 400, 500 and 1000 pieces are made.

Scheduling Approach: Low Volume Job Shop

Why scheduling is required?
?Increased throughput ?Decreased turnaround time ?User deadlines met ?Users made responsible for providing input on schedule ?Improved communications with users ?Avoidance of overloading and underuse of resources ?Job delays more readily apparent ?Documentation of scheduling deviations and their causes ?Reduced confusion within the facility ?Predictability of the effects of an increased workload ?Predictability of future equipment and personnel needs

Scheduling Requirements
?Current state of the shop ?Resource and equipment status ?Future orders ?Due dates ?Quantity ?Shop Layout ?Outside services, raw material availability ?Historical equipment performance

Scheduling And Control Functions
1.Allocate orders, equipment, and personnel to work centers or other specified locations.
2.Determine the sequence of order performance (that

is, establish job priorities).

3.Initiate performance of the scheduled work.
4.Shop-floor control (or production activity control):
a.Review the status and control the progress of orders as they are being worked on. b.Expedite late and critical orders.

Job Sequencing
• Setting up Priority Rules to order jobs. • Performance measures to evaluate priority rules: 1. Meeting due dates of customers. 2.Minimizing the flow time. 3.Minimising work-in-process inventory. 4.Minimising idle time of machines or workers.

Gantt Chart
Stage Mixing Rolling Drying Cutting Moulding Cooling 1st finishing 2nd finishing Weighing & packaging Time (in minutes) 10 15 25 35 45 60 65 75 85 95 105 115 120 130 140 150 160 165

THROUGHPUT TIME
Kneader machine : 10 minutes Rubber stored in bins : 45 minutes Rolling : 5 minutes Drying : 30 minutes Cutting to smaller sheets : 15 minutes Moulding : 5 minutes Cooling : 30 minutes 1st finshing : 25 minutes (per 200 pieces) Collection in bins for transporting : 120 minutes 2nd finishing : 30 minutes (per 200 pieces) Stored in bins : 75 minutes Weighing and Packaging : 15 minutes TOTAL 405 minutes ( 6 hours 45 minutes )

VALUE ADDED TIME
Kneader machine
Rolling Drying

: 10 minutes
: 5 minutes : 30 minutes

Cutting to smaller sheets
Moulding Cooling

: 15 minutes
: 5 minutes : 30 minutes

1st finshing
2nd finishing Weighing and Packaging TOTAL

: 25 minutes (per 200 pieces)
: 30 minutes (per 200 pieces) : 15 minutes : 165 minutes (2 hour 45 minutes)

Modification in Layout Packaging Place

Reduce Wastage
Safety Measures

SUGGESTIONS



doc_905463444.pptx
 

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