Modified Super Efficiency in Presence of Infeasibility: A Nonradial Approach

Subject Areas : Business Strategy

Farhad Hosseinzadeh Lotfi ¹ ( Department of Mathematics Science and Research Branch, Islamic Azad University Tehran, Iran )
G.L. Jahanshahloo ² ( Department of Mathematics Science and Research Branch, Islamic Azad University Tehran, Iran )
Z. Moghaddas ³ ( Department of Electrical Computer and Biomedical Engineerin, Islamic Azad University-Qazvin Branch Qazvin, Iran )
M. Vaez-ghasemi ⁴ ( Department of Mathematics Science and Research Branch, Islamic Azad University Tehran, Iran )

Received: 2014-01-20 Accepted : 2014-02-20 Published : 2015-01-01

Keywords: Ranking, Data envelopment analysis, infeasibility, supper efficiency,

Abstract :

As regards of supper efficiency models which increased thediscrimination power of the standard DEA models, still infeasibility mayoccure. In literature there exists some models overcome this difficulty.In this paper a new procedure has been mooted in order to remove thisshortcoming in a way that both input savings and output surplus arebeing considered. This procedure deals with nonradial changes for bothinputs and outputs at the same time. The great feature of this model isits simplicity and that correspondence linear counter part can be easilywritten.