Description
This is a PPT explaining proprietary scheduling system.It was developed by Dr Goldratt.It covers Drum-buffer-rope system.
OPTIMIZED PRODUCTION TECHNOLOGY ? It is a proprietary scheduling system
? OPT is a trademark of the Scheduling Technology Group ? Originally developed by Dr. Eliyahu Goldratt and
colleagues ? Not just about production but also about financial improvement. ? AIM:-To increase 'throughput' whilst simultaneously decreasing inventory and operating expense.
BOTTLENECKS
• To schedule bottleneck capacity in an efficient way.
• ‘Bottleneck' as any resource whose capacity is equal to
or less than the market demand placed upon it. • It is the constraint that is preventing increased throughput from your factory. • Improvements here will tend to optimise the whole system • It has an increased payback by directly increasing throughput.
THE OPT RULES
? Balance flow not capacity. ? The level of utilization of any part of the system, which is not a bottleneck, is dependent on other constraints in the system, not the potential of the worker. ? The utilization and activation of a resource are not synonymous. ? An hour lost at the bottleneck is an hour lost for the total system. ? An hour saved at a non-bottleneck is just a mirage.
THE OPT RULES(contd.)
? Bottlenecks govern both throughput and inventories.
? The transfer batch may not, and many times should not be equal to the process batch. ? The process batch should be variable, not fixed. ? Schedules should be established by looking at all the constraints simultaneously. Lead times are the results of the schedule and cannot be predetermined.
IMPLEMENTATION
? Identify the system’s constraints
? Exploit the constraint ? Subordinate all else to the constraint ? Elevate the constraint ? If the constraint is no longer a
bottleneck, find the next constraint and repeat the steps
Drum-Buffer-Rope System
CONCEPT
PURPOSE
FACTORY
DRUM
Sets the pace
Constraint
BUFFER
Protects the pace Inventory in front of the constraint Enforces the pace Some type of pull system
ROPE
Summary of Other Approaches
Traditional Just-InManagement Time Operating Expense
Inventory Throughput
Constraint Management
Benefits
REFERENCES
? Production and Operations management- Alan
Muhlemann, John Oakland & Keith Lockyer ? The Goal- Goldratt
? www.tangram.co.uk ? www.dbrmfg.co.nz ? www.goalsys.com
THANK YOU !!!
doc_109621051.ppt
This is a PPT explaining proprietary scheduling system.It was developed by Dr Goldratt.It covers Drum-buffer-rope system.
OPTIMIZED PRODUCTION TECHNOLOGY ? It is a proprietary scheduling system
? OPT is a trademark of the Scheduling Technology Group ? Originally developed by Dr. Eliyahu Goldratt and
colleagues ? Not just about production but also about financial improvement. ? AIM:-To increase 'throughput' whilst simultaneously decreasing inventory and operating expense.
BOTTLENECKS
• To schedule bottleneck capacity in an efficient way.
• ‘Bottleneck' as any resource whose capacity is equal to
or less than the market demand placed upon it. • It is the constraint that is preventing increased throughput from your factory. • Improvements here will tend to optimise the whole system • It has an increased payback by directly increasing throughput.
THE OPT RULES
? Balance flow not capacity. ? The level of utilization of any part of the system, which is not a bottleneck, is dependent on other constraints in the system, not the potential of the worker. ? The utilization and activation of a resource are not synonymous. ? An hour lost at the bottleneck is an hour lost for the total system. ? An hour saved at a non-bottleneck is just a mirage.
THE OPT RULES(contd.)
? Bottlenecks govern both throughput and inventories.
? The transfer batch may not, and many times should not be equal to the process batch. ? The process batch should be variable, not fixed. ? Schedules should be established by looking at all the constraints simultaneously. Lead times are the results of the schedule and cannot be predetermined.
IMPLEMENTATION
? Identify the system’s constraints
? Exploit the constraint ? Subordinate all else to the constraint ? Elevate the constraint ? If the constraint is no longer a
bottleneck, find the next constraint and repeat the steps
Drum-Buffer-Rope System
CONCEPT
PURPOSE
FACTORY
DRUM
Sets the pace
Constraint
BUFFER
Protects the pace Inventory in front of the constraint Enforces the pace Some type of pull system
ROPE
Summary of Other Approaches
Traditional Just-InManagement Time Operating Expense
Inventory Throughput
Constraint Management
Benefits
REFERENCES
? Production and Operations management- Alan
Muhlemann, John Oakland & Keith Lockyer ? The Goal- Goldratt
? www.tangram.co.uk ? www.dbrmfg.co.nz ? www.goalsys.com
THANK YOU !!!
doc_109621051.ppt