本文的目的是推廣Pan和Hsiao[12]的模式,我們放寬前置時間的需求服從常態分配的假設,僅假設已知分配的一級和二級動差。並且考慮前置時間和籌購成本的縮減分別呈線性及對數兩種情況。其目標是同時最佳化訂購量,請購點,前置時間和欠撥價格折扣以使總期望全年存貨成本為最小。找出最佳解的程序被建立,並且兩個數值範例被提出。 The purpose of this study is to generalize Pan and Hsiao’s [12] model, we relax the assumption that the lead time demand follows a normal distribution and merely assumes that the first and second moments of the probability distribution of lead time demand are known. The cases of the linear and logarithmic relationships between lead time and ordering cost reductions are considered. The objective is to minimize the total expected annual inventory cost by simultaneously optimizing the order quantity, reorder point, lead time and backorder price discount. A procedure of finding the optimal solution is developed, and two numerical examples are given to illustrate the results.