第四方物流模式下带折扣的随机需求直接发运库存与运输整合优化

Optimization of the discounted ITIO of stochastic demand and direct delivery in the fourth party's logistic model

库存与运输是物流过程中两个重要环节,二者成本约占物流总成本的三分之二,同时二者之间又存在效益背反现象,此消彼长,库存与运输整合优化问题具有很强的现实意义,已引起了管理界的广泛关注。本文的模型将运输过程分为多个活动,并且每一个活动又有多个代理商可以选择,如果一个代理商承当一个任务的连续的几个活动还可以获得相应折扣。本文的目的就是在第四方物流模式运作下考虑运输活动的多代理商选择并在随机条件下确定客户订货量,从而使运输与库存费用最小。

Inventory and transportation are two important chains of the logistic process. Their costs take two thirds of the total. And at the same time, the two are contradictory in benefit, that is, one decreases and the other increases. The optimization of the two, therefore, is of great significance and has attracted great attention in the management field. In this article, transportation pro- cess is divided into several activities and each activity can be chosen by several agents, ff one agent undertakes several continuous activities of a task, he/she can get certain discounts. The purpose of this article is to consider multi-agent choices of transportation activities in the fourth party＇s logistic model and determine the ordering amount of customers in the stochastic condition so as to make the costs of transportation and inventory smallest.