List of Articles Decision Making Unit Open Access Article Abstract Page Full-Text 1 - Network Data Envelopment Analysis Models For Measuring Efficiency Of a Four-Stage Supply Chain With Returned Outputs M. Vaez-Ghasemi Z. Moghaddas B. Rahmani Open Access Article Abstract Page Full-Text 2 - Using Data Envelopment Analysis-Discriminant Analysis for predicting the congestion Sarah Navidi M. Rostamy Malkhalifeh G. Tohidi mohammad nHassa Behzadi Open Access Article Abstract Page Full-Text 3 - ادغام واحدهای تصمیم گیرنده بر پایه مفهوم تحلیل پوششی داد های معکوس الهه زین الدین سعید قبادی Open Access Article Abstract Page Full-Text 4 - Ideal and anti-ideal decision making units: A fuzzy DEA approach A Hatami-Marbini Saber Saati A Makui Open Access Article Abstract Page Full-Text 5 - Completion of the paper “Ranking Efficient DMUs based on single virtual inefficient DMU in DEA” AmirReza Hassani Tabatabaee Amir Gholam Abri Shokrollah Ziari ebrahim niknaghsh