二级链式供应链系统的动态特性分析

Modeling the dynamics of a two-stage supply chain:a switch system theory approach

分析了由一个分销商和一个零售商组成的二级链式供应链系统的动态特性,指出系统的非线性体现在其切换的本质上———即当分销商的库存受到限制时,该供应链系统就变成了一个线性切换系统,切换动作由系统的状态及外部的决策所控制.在建立了系统的切换系统模型后,对系统的模态及其稳定性进行了分析,并对整个供应链系统的动态特性进行了分析.分析表明,系统中分销商的库存设置对系统动态性存在很大影响,而成员的决策之间相互影响,尤其在供应方库存不足时.对成员的决策提出了建议.

The dynamic characteristics of a two-stage supply chain system, consisting of one retailer and one distributor was analyzed. Pointed out was the non-linearity of the system lied in its switch. When the inventory of the distributor was been restricted, the supply chain system would be changed into a linear switched system. The switch was controlled by the system＇s status and the outside decision. After the es- tablishment of the model for switched system, the model state of the system and its stability, and the dynamic characteristics of the whole supply chain system were analyzed. The analysis indicated that the setting of desired inventory level of the distributor has great influence on the dynamics of the system, and there are interactions between the supply chain members, especially the lack of the supplier＇ s inventory. The suggestions of the member decision were also made.