동적 안전재고를 고려한 롯트량 결정 기법에 관한 연구

A Study on the Lot-Sizing Rules with the Dynamic Safety Stocks

The determination of lot sizes in prevailing inventory problems has been made with constant safety stock over the planning horizon. But, it is more profitable to accommodate the safety stock to dynamically fluctuation demands. The objective of this paper is to study the method to determaine the dynamic safety stock and lot sizing rules depending on the actual customer demands. The last period or highly fluctuation period during the consumption of a lot is the most critical one to stock-out. It means that such periods must be given more attentions. Some dynamic methods to control safety stock are proposed with viewpoints of the time, quantity, and time-quantity. Simulation results show that lot sizing methods with dynamic safely stock reduce about 10% of average total cost compared to those with constant safety stock.