基于串联两阶段网络DEA模型的供应链规模收益分析

数据包络分析(DEA)是评价供应链系统(Supply chain system)间相对有效性的一种重要的工具,但是传统的DEA不考虑供应链的内部结构,对系统效率评价偏高;而本文所研究两阶段串联供应链系统,考虑把部分中间产品作为最终产品输出,增加额外中间投入的情形.基于所提出的供应链系统结构,本文建立相应的串联结构下的网络DEA模型,并针对所建立模型进行相关理论的研究,给出了串联结构下的生产可能集和规模收益情况判定方法.最后,进行数值实验,以验证我们提出的结论.

Analysis on Returns to Scale of Supply Chain Based on a Tandem Two-stage Network DEA Model

Data Envelopment Analysis(DEA) is an important method to evaluate the relative effectiveness among supply chain systems.But the traditional DEA does not consider the internal structure of the supply chain system and highly evaluates the efficiency of it.The two-stage supply chain system studied in this paper,considers the part of the intermediate products as the final product output and adds the additional intermediate inputs.Based on the proposed structure of supply chain system,the paper establishes a network DEA model corresponding to tandem structure,studies the theory for the model and gives the structure of production set and the method to determine returns to scale.Finally,this paper does some numerical experiments to verify our conclusions presented.