A comment on “Supply chain DEA: production possibility set and performance evaluation model

Abstract

In a recent paper in this journal, Yang et al. [Feng Yang, Dexiang Wu,<br />Liang Liang, Gongbing Bi & Desheng Dash Wu (2009), supply chain<br />DEA:production possibility set and performance evaluation model] defined<br />two types of supply chain production possibility set which were proved to be<br />equivalent to each other. They also proposed a new model for evaluating<br />supply chains. There are, however, some shortcomings in their paper. In the<br />current paper, we correct the model, the theorems, and their proofs.<br /><br />