Just-in-Time (JIT) manufacturing is a philosophy developed by Toyota to eliminate waste and continuously improve productivity. It aims to reduce inventory costs by producing and delivering only what is needed for production. Taiichi Ohno at Toyota first implemented JIT in 1950. By reducing setup times and minimizing inventory, JIT strives to improve return on investment. General Electric and other companies adopted JIT principles in the 1980s under different names. JIT goals include eliminating disruptions, increasing flexibility and productivity, and delivering what customers want when they want it at lowest cost. Key steps involve introducing optimized production speeds, reducing stock to zero inventory, and designing plants and processes to avoid stoppages.

1. Manoj Lawate

3. Introduction
• “a philosophy of manufacturing based on
planned elimination of all waste & on
continuous improvement of productivity”
• a production strategy that strives to improve a
business return on investment by reducing
1. in-process inventory
2. associated carrying costs

4. Just In Time!!! Air Traffic Control

5. Founder of JIT
• Founded by Taiichi Ohno
• A vice president of
Toyota
• Basically implemented
in Toyota plant 1950,
well established after
1970
• Well known as Toyota
Production System

6. Followers of JIT
• Adopted by General Electrical in the USA in the 1980
• Some companies referred JIT with different names;
– TOYOTA = ‘Toyota System’
– IBM = ‘continuous flow manufacturing’
– HEWLETT-PACKARD = ‘stockless production & repetitive
manufacturing system’
– GE = ‘management by sight’

7. Some Statistics …
Comparison GM TOYOTA
Assembly Hours 40.7 Hours 16 Hours
Defects per 100 Hours 130 Defects 45 Defects
Average inventory level 2 Weeks 2 Hours

8. JIT Goals…
• Eliminate disruptions
• Make the system flexible
• Reduce set up times & lead time
• Minimize inventory
• Eliminate waste
• Increase productivity
• Give the customer the products they want, when
and where they want them at the minimum cost

9. Steps in JIT
• Introduce the speed
design of process, target, use of recourses
– 1000 cars in a month, 500 workers
– 1000 cars in a week, 1500 workers
• Eliminate or Reduce Stock
zero inventory level is ideal
• Examples of KANBAN
involves a customer & a supplier
aim = to satisfy the customer’s needs

10. Steps in JIT
• Design of Plant
arranging machinery, people & activities
• Reducing & Avoiding set ups & Preventive
Maintenance
so that activity should not stopped
• Simplifying the planning
so that replacement can be possible

11. Tools of JIT
• The 7 wastes
• The 5 Ss
• Kanban Inventory
• Visual Control
• Pokayoke
• Kaizen
• Cellular Work Flow
• Standard Work Concept
• Make it Ugly
• Just Do It

12. The 7 Wastes

20. Waste according to JIT

21. Concluding JIT
• Advantage of JIT
- reduces cost of production
• Disadvantage of JIT
- it takes time to establish

22. Thank You!