短生命周期产品库存控制研究现状

The Research Status of Short Life Cycle Products Inventory Control

产品生命周期包括四个周期:导入期、成长期、成熟期和衰退期。文中主要通过产品生命周期研究在制造与再制造(即二次循环)系统中的库存控制策略。假定:产品的需求率和回收率都是呈正态分布的随机变量;根据产品在不同的生命周期所花费的时间呈平均分布的变化。那么就可以由此得出产品的每个生命周期的最佳生产批量、订货点和安全库存。

This paper investigates inventory control policies in a manufacturing/remanufacturing system during the product life cycle,which consists of four phases：introduction,growth,maturity,and decline.Both demand rate and return rate of products are random variables with normal distribution;the mean of the distribution varies according to the time in the product life cycle.Closed-form formulas of optimal production lot size,reorder point,and safety stock in each phase of the product life cycle are derived.