It is seen that the trade credit period has an important role in real business world. In this article, an inventory model has been developed by considering stochastic lead time demand with lead time crashing cost. Here, also to get the impact between credit period and lead time, a lead time dependent credit period has been considered. In this model, considering partial back-order, the effect of lost sale has been included. Under the above considerations, an inventory model has been optimized in the parlance of infinite time horizon. Here, three objective functions have been developed on the basis of the position of credit period and business period. Finally, to study the feasibility of the model, three different numerical examples have been illustrated with sensitivity analysis with respect to a parameter.

中文翻译：

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基于可允许延迟付款的随机提前期需求的销售损失和缺货混合库存模型

可见，贸易信用期在现实商业世界中具有重要作用。在本文中，通过考虑具有提前期崩溃成本的随机提前期需求开发了库存模型。在这里，同样为了获得信用期和提前期之间的影响，考虑了提前期相关的信用期。在这个模型中，考虑到部分缺货，已经包括了销售损失的影响。基于上述考虑，在无限时间范围内优化了库存模型。在这里，根据信用期和营业期的位置，开发了三个目标函数。最后，为了研究模型的可行性，三个不同的数值例子已经说明了对一个参数的敏感性分析。