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Chapter 16

Chapter 16. Just-In-Time and Lean Production. What is JIT ?. Producing only what is needed, when it is needed A philosophy An integrated management system JIT’s mandate: Eliminate all waste. Inventory Hides Problems. Lower Levels of Inventory Expose Problems. SMED Principles.

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Chapter 16

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  1. Chapter 16 Just-In-Time and Lean Production

  2. What is JIT ? Producing only what is needed, when it is needed A philosophy An integrated management system JIT’s mandate: Eliminate all waste

  3. Inventory Hides Problems

  4. Lower Levels of Inventory Expose Problems

  5. SMED Principles Separate internal setup from external setup Convert internal setup to external setup Streamline all aspects of setup Perform setup activities in parallel or eliminate them entirely

  6. Mixed-Model Sequencing

  7. The Pull System • Material is pulled through the system when needed • Reversal of traditional push system where material is pushed according to a schedule • Forces cooperation • Prevent over and underproduction

  8. Kanban Production Control System • Kanban card indicates standard quantity of production • Derived from two-bin inventory system • Kanban maintains discipline of pull production • Production kanban authorizes production • Withdrawal kanban authorizes movement of goods

  9. a) Two-bin inventory system b) Kanban inventory system Bin 1 Kanban Bin 2 Reorder card Q - R R R Q = order quantity R = reorder point - demand during lead time The Origin of Kanban

  10. Types of Kanbans

  11. Types of Kanbans

  12. JIT Implementation • Use JIT to finely tune an operating system • Somewhat different in USA than Japan • JIT is still evolving • JIT isn’t for everyone

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