Applicable Improvement Approaches in the Evaluation of Banks Branches Using Data Envelopment Analysis Models

Performance evaluation of a Decision Making Unit (DMU) relative to all other DMUs is a competitive process that Data Envelopment Analysis (DEA) technique can measure it with efficiency improvement approaches for each DMUs. But when there are some extraordinary DMUs, the competitive problem will be replaced with monopoly in the process of evaluation and in this case our basic DEA models make invalid efficiency improvement results for DMUs. In this paper, we review these problems in basic DEA models and introduce a DEA model for evaluating DMUs under this circumstance. Also, the model is employed to measure the bank branches efficiency of a commercial banks.