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Slide Show Week #9 Chapter 11 Jit
1. Chapter 11 Just-in-Time and Lean Systems MANAGEMENT 520 CHAPTER 11 JUST IN TIME AND LEAN SYSTEMS
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5. JIT Demand-Pull Logic Here the customer starts the process, pulling an inventory item from Final Assembly… Then sub-assembly work is pulled forward by that demand… The process continues throughout the entire production process and supply chain Customers Sub Sub Fab Fab Fab Fab Vendor Vendor Vendor Vendor Final Assembly
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8. Minimizing Waste: Focused Factory Networks Coordination System Integration These are small specialized plants that limit the range of products produced (sometimes only one type of product for an entire facility) Some plants in Japan have as few as 30 and as many as 1000 employees
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11. Minimizing Waste: Uniform Plant Loading (heijunka) Not uniform Jan. Units Feb. Units Mar. Units Total 1,200 3,500 4,300 9,000 Uniform Jan. Units Feb. Units Mar. Units Total 3,000 3,000 3,000 9,000 Suppose we operate a production plant that produces a single product. The schedule of production for this product could be accomplished using either of the two plant loading schedules below. How does the uniform loading help save labor costs? or
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13. Minimizing Waste: Inventory Hides Problems Work in process queues (banks) Change orders Engineering design redundancies Vendor delinquencies Scrap Design backlogs Machine downtime Decision backlogs Inspection backlogs Paperwork backlog Example: By identifying defective items from a vendor early in the production process the downstream work is saved Example: By identifying defective work by employees upstream, the downstream work is saved
14. Minimizing Waste: Kanban Production Control Systems Storage Part A Storage Part A Machine Center Assembly Line Material Flow Card (signal) Flow Withdrawal kanban Once the Production kanban is received, the Machine Center produces a unit to replace the one taken by the Assembly Line people in the first place This puts the system back were it was before the item was pulled The process begins by the Assembly Line people pulling Part A from Storage Production kanban
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