Sensitivity Analysis Algorithm to Measure Fuzzy Efficiency Security Margin of DMUs: A New FDEA approach

Fuzzy Optimization and Modeling Journal

مقاله 1، دوره 4، شماره 4، اسفند 2023، صفحه 1-16   

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/fomj.2024.1996551.1117

نویسندگان

Fatemeh Komaki¹؛ Reza Fallahnejad^{* 1}؛ Farhad Losseinzadeh Lotfi²؛ Mohsen Rostamy_Malkhalifeh³

¹Department of Mathematics, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

²Department of mathematics, Science and Research Branch, Islamic Azad University, Tehran, Iran

³Department of Mathematics, Science and Research Branch, Islamic Azad University, Tehran, Iran

چکیده

Abstract

As the calculated efficiencies for the DMUs is relative, so each DMU attempts to improve its performance to don’t miss the position of efficiency in compete with other DMUs. Generally, the performance of DMUs can be evaluated from two perspectives-optimistic and pessimistic. A part of data envelopment analysis examines the sensitivity of the set of efficient DMUs to changes in input and output values. In real world, DEA is sometimes faced with fuzzy and interval inputs and/or outputs. In this paper we focus on the one of important subjects of sensitivity analysis and present an algorithm which uses the classic fuzzy DEA models that can determine the relative efficiency security margin of DMUs with fuzzy and interval inputs and outputs and their simultaneous perturbation. Of course, in addition to the optimistic frontier, we also consider the pessimistic frontier for the observed DMUs and call it the inefficiency improvement margin. With this information, the managers of companies can identify their closest threat and improve their performance in order to keep their position in ranking. Some numerical examples for illustration are given.

کلیدواژه‌ها

Data Envelopment Analysis؛ Sensitivity Analysis؛ Fuzzy Efficiency Security Margin