A Revision of the Power Approximation for Computing (s, S) Policies
修正了计算(s, S)库存策略的幂近似方法，确保需求单位一致性和小方差下的极限行为，计算显示修正后的操作特性接近最优。
A revision of the Power Approximation for computing (s, S) inventory policies is presented. The revision incorporates modifications which (1) ensure homgeneity in the units chosen to measure demand and (2) ensure the proper limiting behavior of S − s when the variance of demand is extremely small. Computational experience shows that the revision has operating characteristics that are typically within a few percent of optimal, which is nearly as accurate as the original Power Approximation.