供給能力制約下での余裕在庫率による多品目向け最適化在庫補充方式

抄録

The new re-order system aims to prevent running out of stock, to limit replenishment quantities and to keep reasonable stock level for multi-items. In the Lot-size re-order system and the Interval re-order system, replenishment intervals or quantities are determined by the each system after replenishment items are decided. When both re-order systems run for multi-items, total replenishment quantities usually over or under the limited capacity. The problem of the limited capacity was solved by the production scheduling or supply lead-time delay. We propose Optimal Ordering Method (OOM) to be controlled by the margin stock ratio under the limited capacity. Margin stock ratio is defined by the prediction of the out-of-stock situation that is calculated by the available stock of inventory and necessary demand quantities of supply lead-time period. After each item is arranged by the margin stock ratio, replenishment items are determined under the limited capacity. This new method has been applied to a window frame manufacturing process successfully.