om&pm/class 4b1 1operations strategy 2process analysis 3lean operations –class 3b: house game...
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OM&PM/Class 4b 1
1 Operations Strategy
2 Process Analysis
3 Lean Operations– Class 3b: House Game
– Class 4a: The Paradigm of Lean Operations: The ideal
– Class 4b: Getting to the ideal with Product Variety: TPS» Managing variety/flexibility
» Toyota Production System
4 Supply Chain Management
5 Capacity Management in Services
6 Total Quality Management
7 Business Process Reengineering
Operations Management & Performance Modeling
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OM&PM/Class 4b 2
How to run Lean Operations:Managing Variety
Monthly Production Requirement:
Model Sedan StationWagon
Quantity 10,000 10,000
How should production be scheduled for the month?
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OM&PM/Class 4b 3
Synchronize: Heijunka Mixed Level/Balanced Production
Batch Production Schedule Mixed Production Schedule
(AAAABBBB..) (ABAB...)
Product Apr/12.................15...........................30 Apr/12....................15.......................30
A
B
time
FGI
time
FGI
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OM&PM/Class 4b 4
Synchronize: HeijunkaUniform Plant Loading
This does not mean building a single product.
Rather: – maintain a stable mix of products,
– and firm frozen schedules based on actual orders
Benefits:
Costs: Must reduce scale economies
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OM&PM/Class 4b 5
Reducing Waste: Reduced Setup Times
What are the consequences of long setup times?
A requirement for small-lot-size, mixed-model production?
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OM&PM/Class 4b 6
Reducing Waste:Mixed-Load Pickup and Delivery
Part A Plant
Part B Plant
Part C Plant
AssemblyLine
Part A Plant
Part B Plant
Part C Plant
AssemblyLine
IndividualPickup
Mixed-LoadPickup
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OM&PM/Class 4b 7
Reducing Waste:Quality at the Source
DefectsFound at:
Own Process Next Process End of Line FinalInspection
End User’sHand
$ $ $ $ $
Impact to theCompany
VeryMinor
MinorDelay
Rework Resched.
of work
SignificantRework
Delay inDelivery
AdditionalInspection
Warrantycosts
Administrative costs
Reputation Loss of
MarketShare
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OM&PM/Class 4b 8
Reducing Waste:Quality at the Source
Fool-proof/Fail-safe design (Poka-Yoke) Inspection
– Self
– Automated (Jidoka)
Line-stopping empowerment (Andon)
Human infrastructure
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OM&PM/Class 4b 9
Continuous Improvement: Kaizen
Increase visibility of waste Targeted improvements
– Active worker involvement
– Time for experimentation
– Supplier involvement
Exploratory stress
Human infrastructure
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OM&PM/Class 4b 10....
Lean Operations:Best Implementation is TPS
TPS is a production management system that aims for the “ideal” through continuous improvement
Includes, but goes way beyond JIT. Pillars:– Synchronization: through JIT + Heijunka
– Quality at Source: through Jidoka
– Continuous Improvement (Kaizen): through empowerment, visibility & stress
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OM&PM/Class 4b 11
Class 4b: Learning Objectives
Lean Operations: In Search for the Holy Grail and zero Waste– Efficient Workflow: Cellular Layout
– Level Mixed Production: Heijunka» Reduced batch sizes
– Pull Execution: Kanbans
– Quality at source: Jidoka
– Continuous Improvement: Kaizen
Flow Synchronization
Low Cost
Get ever closer to ideal