MRP 物流信息技术 教学课件.pptVIP

产品结构 园珠笔 笔芯 笔筒 笔油墨 笔芯头 笔芯杆 笔帽 A产品的物料清单（产品结构树） B(4) E(1) D(2) C(2) F(2) D(3) A Example of MRP Logic and Product Structure Tree U(2) X(2) W(1) V(3) Y(2) W(2) T Product Structure Tree for Assembly A Lead Times T 1 week U 2 weeks V 2 weeks W 3 weeks X 1 week Y 1week Given the product structure tree for “A” and the lead time and demand information below, provide a materials requirements plan that defines the number of units of each component and when they will be needed 7周内完成100单位产品的MRP The McGraw-Hill Companies, Inc., 2006 * Example of MRP Logic and Product Structure Tree B(4) E(1) D(2) C(2) F(2) D(3) A Product Structure Tree for Assembly A Lead Times A 1 day B 2 days C 1 day D 3 days E 4 days F 1 day Total Unit Demand Day 10 50 A Day 8 20 B (Spares) Day 6 15 D (Spares) Given the product structure tree for “A” and the lead time and demand information below, provide a materials requirements plan that defines the number of units of each component and when they will be needed LT = 1 day First, the number of units of “A” are scheduled backwards to allow for their lead time. So, in the materials requirement plan below, we have to place an order for 50 units of “A” on the 9th day to receive them on day 10. Next, we need to start scheduling the components that make up “A”. In the case of component “B” we need 4 B’s for each A. Since we need 50 A’s, that means 200 B’s. And again, we back the schedule up for the necessary 2 days of lead time. B(4) E(1) D(2) C(2) F(2) D(3) A Spares LT = 2 4x50=200 B(4) E(1) D(2) C(2) F(2) D(3) A Part D: Day 6 Finally, repeating the process for all components, we have the final materials requirements plan: The McGraw-Hill Companies, Inc., 2006 * B(4) E(1) D(2) C(2) F(2) D(3) A 40 + 15 spares Part D: Day 6 Finally, repeating the process for all components, we have the final materials requirements plan: The McGraw-Hill Companies, Inc., 2006 * MRP的目的 控制库存水平 确定产品生产的优先等级以及计划生产 系统的能力复合 宗旨：使合适的物料在合适的时间到达 合适的地点。 訂货点