产能管理(capacitymanagement)(中英文)(编辑修改稿)

产能管理(capacitymanagement)(中英文)(编辑修改稿)内容摘要：

in 2 . 5 m in110 2110 m in15 m in0 . 7 5 m in0 . 5 0 m in121 31215 m in25 m in15 m in0 . 3 0 m in0 . 2 5 m in0 . 2 5 m in122 231325 m in30 m in75 m in30 m in0 . 7 5 m in0 . 1 5 m in0 . 5 0 m in0 . 7 5 m in41 Work Center Master Files W o r kC e n t e rA v a i l a b l e( mi n )U t i l i z a t i o n Eff i c i e n c y P l a n n e dQ u e u e1232 , 4 0 02 , 4 0 02 , 4 0 0100%100%100%100%100%100%4 d a y s4 d a y s4 d a y s42 MPS for Part 100 W e e k1 2 3 4 5 6 7 8 9 10 11 12Q u an t i t y 250 200 250 150 200 300 150 250 200 200 250 20043 RCCPProcess Time Computation Part Op n . LS SU Run Proc es s Qty/FG T o tal WC100 1 200 30 2 .50 2 .65 0 1 2 .65 0 11 1 0 1 400 10 0 .75 0 .77 5 2 1 .55 0 21 1 0 2 400 15 0 .50 0 .53 8 2 1 .07 6 1121 1 2400 15 0 .30 0 .30 6 6 1 .83 6 3121 2 2400 25 0 .25 0 .26 0 6 1 .56 0 1121 3 2400 15 0 .25 0 .25 6 6 1 .53 6 2122 1 6000 25 0 .75 0 .75 4 10 7 .54 0 2122 2 6000 30 0 .15 0 .15 5 10 1 .55 0 3122 3 6000 75 0 .50 0 .51 3 10 5 .13 0 1122 4 6000 30 0 .75 0 .75 5 10 7 .55 0 344 RCCPBOR Computation P a r t LS SU P r c e s s R un Q t y / F G T ot a l WC WCt o t a l100 400 15 2 1122 6000 75 10 1121 2400 25 6 1100 200 30 1 1 121 2400 15 6 21 10 400 10 2 2122 6000 25 10 2 122 6000 30 10 3122 6000 30 10 3121 2400 15 6 3 45 Rough Cut Capacity Requirements W eekW o r k Cent er 1 2 3 4 5 6 7 平均12326042657273420832125218726042657273415621594164020832125218731253188328115621594164022322277234346 RCCP 05001000150020xx2500300035001 2 3 4 5 6 7WC1WC2WC347 RCCP A11 A12 A22 A21 WC1 WC2 P1 P2 B11 B12 B22 B21 P1 P2 M1 M2 C11 C12 C22 C21 WC1 WC2 M1 M2 RCCP MPS BOR 48 Backward and Forward Scheduling OP N OP N1 OP 1 ……… Forward scheduling Backward scheduling Order Due Date Order Start Date OP N1 49 Infinite and Finite Loading Infinite Finite Capacity Capacity 050100150200P e r i o dLoadLoad 104 120 180 130 97 125 110 1501 2 3 4 5 6 7 8050100150200P e r i o dLoadLoad 110 120 120 120 105 120 110 1201 2 3 4 5 6 7 850 CRP Definition • The function of establishing, measuring, and adjusting limits or level of capacity • The process of determining in detail the amount of labor and machine resources required to acplish the tasks of production [APICS Dictionary] 51 Capacity Requirements Planning Capacity Requirements Planning Planned orders Released orders Routing Work center Work center load report Revised schedule 52 Manufacturing Order and Routing • Manufacturing Order (Work Order) – A document, group of documents, or schedule identity conveying authority for the manufacture of specified parts or products in specified quantities. [APICS dictionary] • Routing – A set of information detailing the method of manufacture of a particular item. It includes the operations to be performed, their sequence, the various work centers to be involved, and the standards for setup and run (times). [APICS dictionary] 53 Inputs Needed for CRP • Open Order File • Planned Order Releases • Routing File – operations to be performed – sequence of operations – work centers to be used – possible alternate work centers – tooling needed at each operation – standard times: setup times, run times • Work Center File – move time, wait time, queue time • Shop Calendar 54 Lead Time • Manufacturing LT – queue, setup, process, wait, move • Average Q – (SU+RT)1+(SU+RT)2+…+(SU+RT) n queue setup process wait move 1 2 n W/C …….. WIP 55 Expected Queueing Time Activation Queueing Time Assumption: M/M/1queueing system E(Q) = a/[s(as)]。 a: ave. arrival rate。 s: ave. service rate Activation = a/s 56 A Revised Definition of Capacity Available • Capacity available = Time available  Efficiency  Availability  Activation • Availability – 1 the fraction of time down due to machine breakdown and/or absenteeism • Activation – 1 the fraction of down due to lack of work UTILIZATION 57 How Load Is Determined? • The production plan – long range rate of production • The MPS drive MRP – MRP generate planned orders – released (open) orders • CRP (capacity requirements planning) – calculates std hours required, by W/C, by time period, based on planned and open orders 58 Load Determination • Open Orders (from order file status file maintained by production control) – order due date – order quantity – operations pleted – operation remaining • MRPplanned Order Releases ( from MRP’s output) – planned order release date – planned order receipt da。