We have developed some useful theorems to characterize the optimal solution and provide an easy and useful algorithm to find the optimal order quantity and replenishment time.

• 在文中我们发展一些定理来说明最适解唯一存在的必要且充分条件并建立一个简单易懂的演算法来说明如何找出最适的订购周期长度与订购数量。