基于随机提前期的二级库存系统的优化方法

An Optimized Method for Two-echelon Inventory System Based on Stochastic Lead Time

针对需求和提前期均是随机的情况下,考察了一个简单的二级库存系统,即单个供应商、单个零售商的优化问题,两者均采用s,Q策略进行库存管理,他们的订货数量Qr,Qs都是已知常数,以每计划周期内系统运行期望总费用最小建立了目标函数,寻求系统的决策变量sr,ss,最后给出了求解算法与数值算例.

On the condition that demand and lead time are both randomly, the article studies a simple two-echelon inventory system, that is, the optimization problem of one supplier and one retailer. They both use （s, Q） strategy to manage inventory, and both the order quantity Qr and Qs are constant, on this basis, to get the system＇s optimization strategy （sr, ss）, optimization function of the system has been established in the object of minimizing expectation total cost of system running during each planning period, and at last solving arithmetic and numerical example have been given.