Research Paper Supply chain management
1. Information system model for educational management in supply chain for Thai higher education institutions

Artaphon Chansamut

Volume 10, Issue 2 , Spring 2021, Pages 87-94

http://dx.doi.org/10.22105/riej.2021.285518.1225

Abstract
  The research about information system model for educational management in supply chain for Thai higher education institutions. The objectives of research to design and to assess the suitability of an information system model for educational management in supply chain for Thai higher education institutions. ...  Read More

Research Paper Game theory
2. Modeling of the supply chain of cooperative game between two tiers of retailer and manufacturer under conditions of uncertainty

Javid Ghahremani Nahr; Mirreza Zahedi

Volume 10, Issue 2 , Spring 2021, Pages 95-116

http://dx.doi.org/10.22105/riej.2021.276520.1190

Abstract
  The design of a repurchase agreement related to the amount of goods remaining in the two-echelon supply chain between the retailer and the manufacturer is examined. Two scenarios are considered quite separately; In the first scenario (decentralized) in which the retailer determines the price of the product ...  Read More

Research Paper Human factors, ergonomics, and safety
3. Optimal value determination for a shape changeable furniture design parameters using full factorial design of experiment analysis

Mobasshira Zaman

Volume 10, Issue 2 , Spring 2021, Pages 117-127

http://dx.doi.org/10.22105/riej.2021.286958.1226

Abstract
  Optimization and selecting effective design parameters are a big issue in the field of product design and development. The optimal value determination for design parameters is a challenge for the furniture industry. Therefore, an appropriate statistical approach is required. In this research the full ...  Read More

Research Paper Data Envelopment Analysis, DEA
4. 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 , Spring 2021, Pages 128-137

http://dx.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

Research Paper Decision analysis and methods
5. Development of a multi-period multi-attribute group decision-making method using type- 2 fuzzy set of linguistic variables

Ali Dehghani Filabadi; Gholamreza Hesamian

Volume 10, Issue 2 , Spring 2021, Pages 138-154

http://dx.doi.org/10.22105/riej.2021.272821.1187

Abstract
  Recently, fuzzy linguistic variables have gained a great deal of attention from researchers in many decision-making problems. In this problems, type-2 fuzzy sets have been used to better cover linguistic data uncertainty. However, many of research works in this regard have been performed in type-2 fuzzy ...  Read More

Research Paper Decision analysis and methods
6. Greedy algorithm for solving student allocation problem in internship program: a case study

Abdella Yimam Ali

Volume 10, Issue 2 , Spring 2021, Pages 155-164

http://dx.doi.org/10.22105/riej.2021.266125.1179

Abstract
  This paper presented greedy algorithm for solving student allocation problem that has arisen in internship program. In internship program, engineering students stay one semester in industries which are located across the country and teachers visit students once/twice for supervision during the program. ...  Read More

Research Paper Facility location, layout, design, and materials handling
7. Using a new algorithm to improve the search answer in quadratic assignment problem (QAP)

Hossein Jafari; Abbas Sheykhan

Volume 10, Issue 2 , Spring 2021, Pages 165-173

http://dx.doi.org/10.22105/riej.2021.271276.1185

Abstract
  Layout design problem is one of the useful field of study used to increase the efficiency of sources in organizations. In order to achieve an appropriate layout design, it is necessary to define and solve the related nonlinear programming problems. Therefore, using computer in solving the related problems ...  Read More