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【正文】 R e q u i re m e n t s 95L T = 2 O n H a n d = 5 0 50N e t R e q u i re m e n t s 45Pl a n n e d O rd e r R e ce i p t 45Pl a n n e r O rd e r R e l e a s e 45A G ro s s R e q u i re m e n t s 90 12L T = 3 O n H a n d = 7 5 75N e t R e q u i re m e n t s 15 12Pl a n n e d O rd e r R e ce i p t 15 12Pl a n n e r O rd e r R e l e a s e 15 12B G ro s s R e q u i re m e n t s 7 45L T = 1 O n H a n d = 2 5 7 18N e t R e q u i re m e n t s 27Pl a n n e d O rd e r R e ce i p t 27Pl a n n e r O rd e r R e l e a s e 27C G ro s s R e q u i re m e n t s 45 36 54 10L T = 2 O n H a n d = 1 0 10N e t R e q u i re m e n t s 35 36 54 10Pl a n n e d O rd e r R e ce i p t 35 36 54 10Pl a n n e r O rd e r R e l e a s e 35 36 54 10D G ro s s R e q u i re m e n t s 15 135L T = 2 O n H a n d = 2 0 15 5N e t R e q u i re m e n t s 130Pl a n n e d O rd e r R e ce i p t 130Pl a n n e r O rd e r R e l e a s e 130Closed Loop MRP Production Planning Master Production Scheduling Material Requirements Planning Capacity Requirements Planning Realistic? No Feedback Execute: Capacity Plans Material Plans Yes Feedback Manufacturing Resource Planning (MRP II) ? Goal: Plan and monitor all resources of a manufacturing firm (closed loop): – manufacturing – marketing – finance – engineering ? Simulate the manufacturing system Lot Sizing in MRP Programs ? Lotforlot (L4L) ? Economic order quantity (EOQ) ? Least total cost (LTC) ? Least unit cost (LUC)
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