2. Definition
ďJIT is a manufacturing system whose goal is to
optimize processes and procedure by continuously
pursuing waste reduction
ďIt is both a philosophy and a set of methods for
manufacturing. Although it has no single, agreed-
upon definition ,JIT emphasizes waste reduction, total
quality control, and devotion to the customer.
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3. Evolution of JIT
The history of Japan since world war II is the
history of a developing economy, especially
manufacturing. The Japanese economy was also
ruined and faced the challenge of transition from
wartime to a peacetime economy with very resources.
This scarcity of resources was a key factor in the
evolution of the Just-In-Time philosophy.
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4. The Seven Wastages
Shigeo Shingo, a recognized JIT authority and
engineer at the Toyota Motor Company identifies
seven wastes as being the targets of continuous
improvement in production process. By attending to
these wastes, improvement is achieved.
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5. ContdâŚ
ďWaste of Overproduction
ďWaste of Waiting
ďWaste of Transportation
ďWaste of Processing itself
ďWaste of Stocks
ďWaste of Motion
ďWaste of Making Defective Products
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6. Japanese Manufacturing Techniques
ďProduce what the customer desires
ďProduce products only at the rate the customer wants
them
ďProduce with perfect quality
ďProduce by methods that allow people to
develop
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7. ⢠Produce with no waste of labour, material,
or equipment; every move has a purpose
so there is zero idle inventory
⢠Produce instantaneously â with zero
unnecessary lead time
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8. Minimizing Waste: Group Technology (Part 1)
⢠Using Departmental Specialization for plant layout can cause a
lot of unnecessary material movement
⢠Using Departmental Specialization for plant layout can cause a
lot of unnecessary material movement
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Saw Saw
Lathe PressPress
Grinder
LatheLathe
Saw
Press
Heat Treat
Grinder
Note how the flow lines are going back and forthNote how the flow lines are going back and forth
9. Minimizing Waste:
Group Technology (Part 2)
⢠Revising by using Group Technology Cells can reduce movement
and improve product flow
⢠Revising by using Group Technology Cells can reduce movement
and improve product flow
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Press
Lathe
Grinder
Grinder
A
2
BSaw
Heat Treat
LatheSaw Lathe
PressLathe
1
10. Minimizing Waste: Just-In-Time
Production
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⢠Management philosophy
⢠âPullâ system though the plant
⢠Hydraulic Push Systems
WHAT IT IS
⢠Employee participation
⢠Industrial engineering/basics
⢠Continuing improvement
⢠Total quality control
⢠Small lot sizes
WHAT IT REQUIRES
⢠Attacks waste
⢠Exposes problems and bottlenecks
⢠Achieves streamlined production
WHAT IT DOES
⢠Stable environment
WHAT IT ASSUMES
11. JIT Implementation Requirements: Design
Flow Process
ďLink operations
ďBalance workstation capacities
ďRedesign layout for optimum flow
ďEmphasize preventive maintenance
ďReduce lot sizes
ďReduce setup/changeover time
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12. JIT Implementation Requirements: Total
Quality Control
ďWorker responsibility
ďSQC in place
ďEnforce compliance
ďFail-safe methods (poka-yoke)
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13. JIT Implementation Requirements: Work with
Vendors
ďReduce lead times
ďFrequent deliveries
ďProject usage requirements
ďClear Quality expectations
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14. JIT Implementation Requirements: Reduce
Inventory More
ďLook for other areas to reduced materials
ďMinimize Stores
ďMinimize Transit
ďCarousels
ďConveyors
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15. JIT Implementation Requirements: Improve
Product Design
ďStandard produce configuration
ďStandardize and reduce number of parts
ďAlign Process design with product design
ďQuality expectations
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17. JIT in Services (Examples)
ďOrganize Problem-Solving Groups
ďUpgrade Housekeeping
ďUpgrade Quality
ďClarify Process Flows
ďRevise Equipment and Process Technologies
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