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DEA Efficiency Region for Variations of Inputs and Outputs

Author

Listed:
  • Mohammad Khoveyni

    (Department of Applied Mathematics, Yadegar-e-Imam Khomeini (RAH), Shahre Rey Branch, Islamic Azad University, Tehran, Iran)

  • Robabeh Eslami

    (Department of Mathematics, Faculty of Technology and Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran)

Abstract

Finding efficiency regions (ERs) for extremely efficient decision-making units (DMUs) is one of the important issues from the managerial and economic viewpoints. An extremely efficient DMU will remain efficient if and only if after changing its inputs and/or its outputs this DMU stays within its ER. Thus, by applying the ER information, decision maker(s) of the evaluated extremely efficient DMU can precisely understand the values of input(s) increment and output(s) decrement of this DMU so that it remains efficient. Hence, in this study, we propose a data envelopment analysis (DEA) approach based on the defining hyperplanes of the production possibility set (PPS), which is capable of finding the ERs of the DMUs when their inputs increase and/or their outputs decrease. To demonstrate the applicability of the proposed approach, in the real world, a numerical example and an empirical application to the banking industry in the Czech Republic are provided.

Suggested Citation

  • Mohammad Khoveyni & Robabeh Eslami, 2021. "DEA Efficiency Region for Variations of Inputs and Outputs," International Journal of Information Technology & Decision Making (IJITDM), World Scientific Publishing Co. Pte. Ltd., vol. 20(02), pages 707-732, March.
    • Handle: RePEc:wsi:ijitdm:v:20:y:2021:i:02:n:s0219622021500103
    DOI: 10.1142/S0219622021500103
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