面向負荷的生產(chǎn)控制與jit(編輯修改稿)
2025-01-24 19:06 本頁面
【文章內(nèi)容簡介】 nning period planned lead time + planning period Rejected Load Allowed load Load limit Exceeding load Present Load Planned lead time Required Buffer Required capacity Figure5. Shortterm capacity planning using the load limit Required Input Curve Required output curve . Order release should consider the work center loads and capacities Four type of loads In case of B,D a statistical estimation is needed 。 Load conversion factor depreciation factor = planned output / Load limit = planning period planned lead time + planning period Limiting and balance work in process by order release. Planned Inv. (I) (D) Load limit Planned lead time Today Planned Inv. (Buffer) Planned output(capacity) (D) Planned Release(I) Ideal Released Curve Full load Converted Load Figure6. Derivation of conversion using the load limit A considering the available capacities of a shortterm planning periods(1~2Week) Planned orders were scheduled backward Selects periodically those of the planned orders Step1. Establish urgent orders Step2. Release wotrkable orders Time limit 3. Basic concept in loadoriented manufacturing control Technique of loadoriented order release . If capacities is needed Loadoriented release require appreciate decision c b a a c a b b a c Planning period Time limit today Time [Days] Due Over due Future NonUrgent Order 4 3 1 2 Workable Workable Unworkable Omissible A B C Work centers Load [Hours] Load limit Released Load Remaining Load Figure 7. Steps of Loadoriented order release 3. Basic concept in loadoriented manufacturing co
教學課件相關(guān)推薦
鄂ICP備17016276號-1