Sensitivity Analysis in Two-Stage DEA

Iranian Journal of Optimization

مقاله 6، دوره 7، شماره 2، اسفند 2015، صفحه 857-864   

نوع مقاله: Research Paper

نویسندگان

Athena Forghani^* ؛ Esmaeil Najafi

Islamic Azad University, Science and Research Branch

چکیده

Data envelopment analysis (DEA) is a method for measuring the efficiency of peer decision making units (DMUs) which uses a set of inputs to produce a set of outputs. In some cases, DMUs have a two-stage structure, in which the first stage utilizes inputs to produce outputs used as the inputs of the second stage to produce final outputs. One important issue in two-stage DEA is the sensitivity of the results of an analysis to perturbations in the data. The current paper looks into combined model for two-stage DEA and applies the sensitivity analysis to DMUs on the entire frontier. In fact, necessary and sufficient conditions for preserving a DMU's efficiency classiffication are developed when various data changes are applied to all DMUs.

کلیدواژه‌ها

Two-stage DEA؛ Weighted sum model؛ Combined DEA model؛ Sensitivity analysis

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