Data Envelopment Analysis, DEA
Technical analysis of petrochemical industries of Iran using a network data envelopment analysis model

Amir Reza Bazargan; Seyyed Esmaeil Najafi; Farhad Hosseinzadeh Lotfi; Mohammad Fallah

Volume 12, Issue 4 , December 2023, , Pages 337-363

https://doi.org/10.22105/riej.2023.384254.1366

Abstract
  The data envelopment analysis method is commonly used to measure efficiency. An estimate of the relative efficiency of this model is derived by calculating the ratio between inputs and outputs. Data envelopment analysis models can also be applied to network structures due to the extension of these models. ...  Read More

Data Envelopment Analysis, DEA
Classifications of linking activities based on their inefficiencies in Network DEA

Reza Rasi Nojehdehi; Hadi Bagherzadeh Valami; Seyyed Esmaeil Najafi

Volume 12, Issue 2 , June 2023, , Pages 165-176

https://doi.org/10.22105/riej.2022.360989.1335

Abstract
  Network DEA models deal with measurements of relative efficiency of Decision-Making Units (DMUs) when the insight of their internal structures is available. In network models, sub-processes are connected by links or intermediate products. Links have the dual role of output from one division or sub-process ...  Read More

Data Envelopment Analysis, DEA
Identification and evaluation of congestion in two-stage network data envelopment analysis

Sarvar Sadat Kassaei; Farhad Hosseinzadeh Lotfi; Alireza Amirteimoori; Mohsen Rostamy-Malkhalifeh; Bijan Rahmani

Volume 12, Issue 1 , March 2023, , Pages 53-72

https://doi.org/10.22105/riej.2023.326879.1294

Abstract
  Congestion is one of the important concepts in data envelopment analysis that occurs when excessive inputs reduce the maximally possible outputs. Identification and elimination of congestion have a significant impact on reducing inputs along with increasing outputs. Hence, various studies have been conducted ...  Read More

Data Envelopment Analysis, DEA
A neutral DEA model for cross-efficiency evaluation

Abbas Ghomashi Langroudi; Masomeh Abbasi

Volume 11, Issue 4 , December 2022, , Pages 411-422

https://doi.org/10.22105/riej.2023.343160.1314

Abstract
  The Cross-efficiency method in data envelopment analysis (DEA) has widely been used as a suitable utility for ranking decision-making units (DMUs). In this paper, for overcoming the issue of the existence of multiple optimal solutions in cross-efficiency evaluation, we use the neutral strategy to design ...  Read More

Data Envelopment Analysis, DEA
A new model to measuring efficiency and returns to scale on data envelopment analysis

Abbasali Monzeli; Behrouz Daneshian; Gasem Tohidi; Shabnam Razavian; Masud Sanei

Volume 10, Issue 2 , June 2021, , Pages 128-137

https://doi.org/10.22105/riej.2021.272673.1186

Abstract
  We extend the concept of returns to scale in Data Envelopment Analysis (DEA) to the weight restriction environments. By adding weight restrictions, the status of returns to scale, i.e. increasing, constant, and decreasing, may need a change. We first define "returns to scale" underweight restrictions ...  Read More

Data Envelopment Analysis, DEA
The survey of data envelopment analysis models in fuzzy stochastic environments

F. Z. Montazeri

Volume 8, Issue 4 , December 2019, , Pages 366-383

https://doi.org/10.22105/riej.2020.219518.1121

Abstract
  One of the best techniques for evaluating the performance of organizations is data envelopment analysis. Data Envelopment Analysis (DEA) is a non-parametric method for evaluating the performance of decision-making units (DMUs) that recognizes the relative performance of DMUs based on mathematical programming. ...  Read More

Data Envelopment Analysis, DEA
Investment projects ranking with DEA method considering feasibility study results

M. V. Sebt; M. N. Juybari; V. R. Soleymanfar

Volume 7, Issue 3 , November 2018, , Pages 320-335

https://doi.org/10.22105/riej.2018.147016.1058

Abstract
  According to the increasing need of industry to financiers and investors in order to incorporate and encouraging them to invest in various fields of industry, the necessity of a method to help investors for making a decision has emphasized. We present a method which tries to omit to apply personally ...  Read More

Data Envelopment Analysis, DEA
Determine the Efficiency of Time Depended Units by Using Data Envelopment Analysis

Z. Taeb; F. Hosseinzadeh Lotfi; S. Abbasbandy

Volume 6, Issue 3 , November 2017, , Pages 193-201

https://doi.org/10.22105/riej.2017.49156

Abstract
  In the last years, several techniques have been reported for managing a system and recognition of the related decision making units. One of them is based on mathematical modeling. Efficiency of any system is very important for all decision makings. Often applied data have time dependent inputs/ outputs. ...  Read More

Fuzzy optimization
Organizational Performance Evaluation Considering Human Capital Management Approach by Fuzzy-DEA: A Case Study

M. M. Tavakoli; B. Molavi; H. Shirouyehzad

Volume 6, Issue 1 , March 2017, , Pages 1-16

https://doi.org/10.22105/riej.2017.48022

Abstract
  In recent years, researchers in their studies considered human capital as one of the most important capitals of every organization and even some of them placed it beyond this definition and introduced it as the unique factor of creating the competitive advantage in the organization. Due to the importance ...  Read More

Data Envelopment Analysis, DEA
The Methods of Ranking based Super Efficiency

M. Nayebi; F Hosseinzadeh Lotfi

Volume 5, 1(4) , November 2016, , Pages 43-66

https://doi.org/10.22105/riej.2017.49169

Abstract
  The science of Data Envelopment Analysis (DEA) evaluates the effectiveness of decision making units. But, one of the problems of Data Envelopment Analysis (DEA) is that, if the number of units with the same efficiency equal to one was more than one, then we couldn’t select the best between them. ...  Read More

Data Envelopment Analysis, DEA
Assess the efficiency and effectiveness simultaneously in a three-stage process, by using a unified model

F Hosseinzadeh Lotfi; M. Jahanbakhsh

Volume 4, 1(4) , November 2015, , Pages 15-23

https://doi.org/10.22105/riej.2017.49165

Abstract
  By distinction between efficiency and effectiveness scales, the aim of this paper is to propose a model that can show the differents of efficiency and effectiveness. For this purpose, enveloping form of ICCR model ,has considered to calculate simultaneously the influences of efficiency and effectiveness. ...  Read More