麥x錫-topmanagementtrainingjit(參考版)
2025-05-28 14:21本頁(yè)面
【正文】 Delivery ? Product can be built to order (if manufacturing leadtime is shorter than customer lead time) ? The production process is synchronised to customer demand ? FIFO must be maintained FIFO Maintained FIFO Maintained Build List Process A Process B Finished Goods Production control Order customer Just in Time Just in Time has three parts, based on one prerequisite: Continuous Flow Processing P F C Levelled production Takt time Pull system ? Continuous Flow Processing ? Takt time ? Pull system ? Levelled Production Continuous Flow Processing Continuous Flow Processing eliminates product stagnation within and between processes: Continuous Flow Processing P F C Levelled production Takt time Pull system ? One piece at a time production ? Multiprocess handling One piece at a time production One piece flow is the first step in improving material flow. Process C Process A Process B Process ABC C F P Traditional manufacturing inhibits material flow and creates WIP. Multiprocess handling Machine layout to support product flow eliminates material stagnation. Store Multimachine handling Drill A Drill C Drill B B A C Mill B Mill C Turn A Turn B Turn C Mill A B A C B A C Mill A Drill A Turn A Mill B Drill B Turn B Mill C Drill C Turn C Multiprocess handling Store B A C C F P 1 2 3 Process 1 2 3 4 5 6 7 8 9 (time in minutes) Continuous Flow Processing Lead time Continuous Flow Processing dramatically reduces lead time, giving greater responsiveness to the customer. 1 2 3 Batch Production Process 1 2 3 4 5 6 7 8 9 (time in minutes) ?First part plete after 7 minutes ?Customer order plete after 9 minutes delay delay ?First part plete after 3 minutes ?Customer order plete after 5 minutes 7 9 5 C F P Takt time Once material flow has been improved, takt time matches the pace of the manufacturing process to customer demand. Takt Takt time kt tiContinuous Flow Processing P F C Levelled production Pull system ? Calculation ? Application ? Benefits Takt time is the frequency at which a part must be produced to satisfy customer demand: Takt time = total time available* total customer demand Takt time makes no allowances for machine inefficiency (. breakdowns, changeovers). In some cases it may be necessary to allow for inefficiency, but i
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