Shabnam Razavyan - Department of Mathematics, Islamic Azad University, South Tehran Branch, Tehran-Iran
Ghasem Tohidi - Department of Mathematics, Islamic Azad University, Central Tehran Branch, Tehran-Iran

This paper uses the concept of most efficient Decision Making Units (DMU) and proposes a model for ranking all extreme and non-extreme efficient DMUs. In the sequence of iterations, the proposed model chooses the most efficient DMU among efficient DMUs. Therefore, it seems that ranking criteria of proposed approach is more precise. We illustrate the application of proposed method by an numerical example.

Data envelopment analysis (DEA); Ranking; Integrated DEA models