List of Articles efficiency analysis Open Access Article Abstract Page Full-Text 1 - Efficiency Analysis Based on Separating Hyperplanes for Improving Discrimination among DMUs M. Mohammadpour Open Access Article Abstract Page Full-Text 2 - Development of open and non-homogenous network data envelopment analysis model Vahid Ettehadi Hasan Hoseininasab Mohammad Bagher Fakhrzad Hasan Khademizare 10.30495/qjopm.2021.1925553.3106 Open Access Article Abstract Page Full-Text 3 - Evaluating Relative Efficiency of Major Cargo Ports in the Middle East: The Integrated DEA-AP Approach Azita Hajizadeh Seyed Nasser Saeidi Amer Kaabi Homayoun Yousefi Mostafa Zaredoost Open Access Article Abstract Page Full-Text 4 - Implementing Fuzzy DEA into the PEM Model for Performance Evaluation of Project-based Organizations: A case study Owais Torabi Mohammad Milad Ahmadi Ruhollah Tavallaei Open Access Article Abstract Page Full-Text 5 - Using lexicographic parametric programming for identifying efficient hyperpalnes in DEA Farhad Hosseinzadeh Lotfi F. Rezai Balf A. Taghavi