Measurement of Inefficiency Slacks in Network Data Envelopment Analysis

Theory of Approximation and Applications

مقاله 4، دوره 13، شماره 1، مرداد 2019، صفحه 43-66   

نوع مقاله: Research Articles

نویسندگان

Hossein Azizi^{* 1}؛ Alireza Amirteimoori²؛ Sohrab Kordrostami³

¹Department of Applied Mathematics, Parsabad Moghan Branch, Islamic Azad University, Parsabad Moghan, Iran

²Department of Applied Mathematics, Rasht Branch, Islamic Azad University, Rasht, Iran

³Department of Applied Mathematics, Lahijan Branch, Islamic Azad University, Lahijan, Iran

چکیده

The two-stage data envelopment analysis models show the performance of individual processes and ‎thus, provide more information for decision-making compared with conventional one-stage models. ‎This article presents a set of additive models (optimistic and pessimistic) to measure inefficiency ‎slacks in which observations are shown with crisp numbers. In the concept of pessimistic efficiency, ‎DMU with balanced input and output data can be scored as efficient. Since pessimistic efficiency ‎represents the minimum efficiency that is guaranteed in any unfavorable conditions, the assessment ‎based on this efficiency is in compliance with our natural meaning, especially in risk-averse situations. ‎Therefore, pessimistic efficiency solely can play a useful role in the DMU ranking. However, it is not ‎a good idea to ignore optimistic efficiency. Hence, it is an inevitable necessity to integrate different ‎performance sizes in order to achieve an overall performance assessment for each DMU. An example ‎of resin manufacturer companies in Iran is presented to explain how to calculate the system and ‎process inefficiency slacks.‎

کلیدواژه‌ها

Data envelopment analysis؛ inefficiency slacks؛ series systems؛ optimistic and pessimistic viewpoints؛ ‎overall performance

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