TY - JOUR ID - 276 TI - Improving envelopment in data envelopment analysis by means of unobserved DMUs: an application of banking industry JO - Journal of Quality Engineering and Production Optimization JA - JQEPO LA - en SN - AU - rakhshan, fatemeh AU - Alirezaee, Mohammad Reza AD - student AD - master Y1 - 2015 PY - 2015 VL - 1 IS - 2 SP - 71 EP - 80 KW - data envelopment analysis KW - linear programming applications KW - value judgments DO - 10.22070/jqepo.2015.276 N2 - In data envelopment analysis, the relative efficiency of a decision making unit (DMU) is defined as the ratio of the sum of its weighted outputs to the sum of its weighted inputs allowing the DMUs to freely allocate weights to their inputs/outputs. However, this measure may not reflect a the true efficiency of a DMU because some of its inputs/outputs may not contribute reasonably in computing the efficiency measure. Traditionally, to overcome this problem weights restrictions have been imposed. But an approach for solving this problem by inclusion of some unobserved DMUs, obtained via a process with four steps, has been proposed in 2004. These unobserved DMUs are created by adjusting the output levels of certain observed relatively efficient DMUs. The method used in this research is for DMUs that are operating under a constant return to scale (CRS) technology with a single input multi-output context. This method is implemented for 47 branches of bank Maskan in northeast of Tehran and the results will be analysed. UR - https://jqepo.shahed.ac.ir/article_276.html L1 - https://jqepo.shahed.ac.ir/article_276_7f2b16eff6fae909d55890a260adf738.pdf ER -