Overall Efficiency of Four-Stage Structure with Undesirable Outputs: A New SBM Network DEA Model

Benchmarking is the major reason for widespread use of DEA models efficiency analysis. Determining closest targets DMUs, play a key role in benchmarking their best performance. In fact, these help develop certain performance enhancement plans that need fewer attempts made by DMUs. Therefore, this study proposes novel method based on network to determine most appropriate target every stage addition The proposed model differs from those other studies fact all consider input and output values be linear. However, real-world problems, many DMU inputs outputs have nonlinear (values are coefficients or modeling can price desirable cost undesirable outputs), something which was taken into account process study. employed benchmark cement factories listed Tehran Stock Exchange.