Some clarifications on the DEA clustering approach

Gholam R. Amin, Ali Emrouznejad, S. Rezaei

Research output: Contribution to journalArticlepeer-review


This paper clarifies the role of alternative optimal solutions in the clustering of multidimensional observations using data envelopment analysis (DEA). The paper shows that alternative optimal solutions corresponding to several units produce different groups with different sizes and different decision making units (DMUs) at each class. This implies that a specific DMU may be grouped into different clusters when the corresponding DEA model has multiple optimal solutions. © 2011 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)498-501
Number of pages4
JournalEuropean Journal of Operational Research
Issue number2
Publication statusPublished - 1 Dec 2011


  • data envelopment analysis
  • clustering
  • alternative optimal solutions


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