Case studies in industry and services
Selecting the optimal industrial investment by multi-criteria decision-making methods with emphasis on, TOPSIS, VIKOR, and COPRAS (case study of Guilan province)

S. F. Fakhrehosseini

Volume 8, Issue 4 , December 2019, , Pages 312-324

http://dx.doi.org/10.22105/riej.2020.216548.1117

Abstract
  The expansion of production and development in the industrial sector, it is necessary to increase the investment in that. But limits of the financial resources to the investment and high risk for investments in industrial and production activities on the one hand, and the frequency of necessities and ...  Read More

A framework to evaluate and improve supply chain: FAHP based case study on a supermarket

S. Haldar; C. L. Karmaker; Sk. R. Hossain

Volume 7, Issue 4 , December 2018, , Pages 423-440

http://dx.doi.org/10.22105/riej.2018.80556

Abstract
  Nowadays, the supply chain has become a buzzword in the business field. The only supply chain can help to lead a business in an organized way. However, in a supermarket, the supply chain is very important, but they need to ensure better communication with the supplier, customer, and internal management ...  Read More

Performance Evaluation Function for Benchmarking Process Using Context-Dependent Data Envelopment Analysis

H. Bagherzadeh Valami; S.E. Najafi; B. Farajollahzadeh

Volume 1, Issue 1 , June 2012, , Pages 19-28

Abstract
  Data envelopment analysis (DEA) is a methodology for identifying efficient frontier of decision making units (DMUs) with multiple outputs and inputs. Context-dependent DEA refers to a DEA approach where a set of DMUs are evaluated against a particular evaluation context. Each evaluation context represents ...  Read More

A Genetic Algorithm Coupled with Tabu Search for Bi-Objective Permutation Flow Shop

N. Shahsavari Pour; M.H. Abolhasani Ashkezari; H. Mohammadi Andargoli

Volume 2, Issue 1 , February 2013, , Pages 20-29

Abstract
  Considering flow shop scheduling problem with more objectives, will help to make it more practical. For this purpose, we have intended both the makespan and total due date cost simultaneously. Total due date cost is included the sum of earliness and tardiness cost. In order to solve this problem, a genetic ...  Read More

Presenting an Analytic Hierarchy Process- Assurance Region- Joint Multiple Layer Data Envelopment Analysis Model for Evaluating the Performance of an Educational System: A Case Study

A. Pakzad; A. Naderi

Volume 3, Issue 4 , December 2014, , Pages 21-40

Abstract
  One of the major problems in organizations is resource limitation, so the main goal of each union is to maximize the usage of their recourses and improve its efficiency. Universities as a main body of each countries educational system have an important role in developing a country. Therefore, assessing ...  Read More

Solving Fuzzy Step Fixed Charge Transportation Problems via Metaheuristics

F. Rajabi; S.E. Najafi; M. Hajiaghaei-Keshteli; S. Molla-Alizadeh-Zavardehi

Volume 2, Issue 3 , September 2013, , Pages 24-34

Abstract
  In the present paper the step fixed charge transportation problem under uncertainty, particularly when variable and fixed cost are given in fuzzy forms, is formulated. In order to solve the problem, two metaheuristic, simulated annealing algorithm (SA) and variable neighborhood search (VNS), are developed ...  Read More

A New Approach in Joint Optimization of Maintenance Planning, Process Quality and Production Scheduling

N. Manavizadeh; E. Azizi Javan

Volume 3, Issue 2 , May 2014, , Pages 24-32

Abstract
  Shop floor performance has great influence on performance of a manufacturing system. Traditionally, shop floor operational policies concerning maintenance scheduling, quality control and production scheduling have been considered and optimized independently. Anyway, these aspects of operations planning ...  Read More

Carbon Based Closed-Loop Supply Chain Design under Uncertainty using an Interval-Valued Fuzzy Stochastic Programming Approach

A. Mohajeri; M. Fallah; F Hosseinzadeh Lotfi

Volume 3, Issue 3 , September 2014, , Pages 24-48

Abstract
  Recovery of used products is receiving much attention recently due to growing environmental concern. In this paper, we address the carbon footprint based problem arising in closed-loop supply chain where returned products are collected from customers. These returned products can either be disposed or ...  Read More

Supply chain management
A Multi-Objective Model for Location-Allocation Problem in a Supply Chain

F. Mokhtari karchegani; H. Shirouyehzad; R. Tavakkoli-Moghaddam

Volume 4, 1(4) , November 2015, , Pages 24-42

http://dx.doi.org/10.22105/riej.2017.49155

Abstract
  The fast changing and dynamic global business environment require companies to plan their entire supply chain from the raw material supplier to the end customer. In this paper, we design an integrated supply chain including multiple suppliers, multiple factories, multiple distributors, multiple customers, ...  Read More

Computational modelling
Option pricing on sesame price using jump diffusion models

T. Berhane; M. Adam; G. Awgichew; E. Haile

Volume 9, Issue 1 , March 2020, , Pages 25-45

http://dx.doi.org/10.22105/riej.2020.209020.1104

Abstract
  In this paper, we aim at developing a model for option pricing to reduce the risks associated with Ethiopian sesame price fluctuations. The White Humera Gondar Sesame Grade 3 (WHGS3) price, which is recorded from 5 November 2010 to 30 March 2018 at Ethiopia Commodity Exchange (ECX) market, is used to ...  Read More

Contractor Selection Using Fuzzy Hybrid AHP-VIKOR

S. Zamani; H. Farughi; M. Soolaki

Volume 2, Issue 4 , December 2013, , Pages 26-40

Abstract
  In recent years, contractors play a major role in construction projects of buildings, roads, or waterworks under supervision of project owners or employers of these projects. So, that is why contractor selection is an important decision for employers. Contractor selection is a multicriterion decision ...  Read More

A New Estimator Based on Likelihood Function for Drift Time of Change in Poisson Rate Parameter

R. Hosseiny; V. Amirzadeh; M. A. Yaghoobi

Volume 3, Issue 1 , May 2014, , Pages 26-38

Abstract
  Although a control chart can signal an out-of-control state in a process, but it does not always indicate when the process change has begun. Identifying the real time of the change in the process, called the change point, is very important for eliminating the source(s) of the change and assists process ...  Read More

A New Bargaining Game Model for Measuring Performance of Two-Stage Network Structures

F. Hosseinzadeh Lotfi; G.R. Jahanshahloo; S. Hemati; S. Givehchi

Volume 1, Issue 2 , July 2012, , Pages 27-39

Abstract
  Data envelopment analysis (DEA) mainly utilizes envelopment technology to replace production function in microeconomics. Based on this replacement, DEA is a widely used mathematical programming approach for evaluating the relative efficiency of decision making units (DMUs) in organizations. Evaluating ...  Read More

Operations Research
Developing 360 degree performance evaluation method for school teachers

M. Movafaghpour

Volume 8, Issue 1 , April 2019, , Pages 28-39

http://dx.doi.org/10.22105/riej.2019.169895.1074

Abstract
  The purpose of this study is to provide a proper method for evaluating performance of teachers, which leads to authorities awareness about the quality and quantity of activities that are acceptable to the organization; also creating the grounds for empowering human resources, reduction of dissatisfaction, ...  Read More

Business Analytics
A Fuzzy-AHP Method for Selection Best Apparel Item to Start-Up with New Garment Factory: A Case Study in Bangladesh

T. K. Biswas; S. M. Akash; S. Saha

Volume 7, Issue 1 , April 2018, , Pages 32-50

http://dx.doi.org/10.22105/riej.2018.111802.1034

Abstract
  The readymade garments industry is rapidly growing and now it is the single highest export earner for Bangladesh. This business sector becomes an attractive investment destination to the country’s new young entrepreneurs upcoming due to its cheaper labor cost, lower investment cost, availability ...  Read More

A Hybrid Genetic Algorithm/Simulation Approach for Redundancy Optimization with Objective of Maximizing Mean Lifetime and Considering Component Selection

H. Karimi; A.A. Najafi

Volume 2, Issue 2 , June 2013, , Pages 35-46

Abstract
  In this paper, we consider a reliability redundancy optimization problem in a series-parallel type system employing the redundancy strategy of cold-standby. The problem consists of two parts component selection and determination of redundancy level of each component—which need to be solved so that ...  Read More

A New Method to Organizational Ranking: Integrating BSC and DEA

H. Golpîra; A. Mohajeri

Volume 1, Issue 3 , December 2012, , Pages 39-47

Abstract
  Nowadays, managers tend to compare their organizations with the others as well they want to have benchmarks. Benchmarking should be based on correct updated organizational critical factors. Balanced scorecard (BSC) is the tool to translate the organizational strategic goals into the operational critical ...  Read More

Case studies in industry and services
Evaluating the Implementation of Strategies in Plants Using Balanced Scorecard (BSC): A Case Study

M. Nikkhah; A. Nikkhah; A. Afsahi

Volume 6, Issue 1 , March 2017, , Pages 39-50

http://dx.doi.org/10.22105/riej.2017.48024

Abstract
  The main purpose of the present paper is to investigate the implementation of strategies in Neka Power Plant Management Company using Balanced Scorecard. For this purpose, it is necessary that the aspects of financial, customer, internal process development and learning BSC in electric power generating ...  Read More

Decision analysis and methods
Evaluation of Iranian automotive industries

M. Hassanpour

Volume 8, Issue 2 , June 2019, , Pages 115-139

http://dx.doi.org/10.22105/riej.2019.183148.1085

Abstract
  The automotive industry comprises all sectors of the design, development, and production as well as marketing and selling of vehicles. Iran's automotive industries possess the largest sector after the oil and petroleum sectors in Iran. The preliminary assessments taken by both of Iranian industries organization ...  Read More

Operations Research
Competition in Supply Chain Network: Retailers’ Risk Averseness Approach

H. Golpira; S. E. Najafi; M. Zandieh; S. Sadi-Nezhad

Volume 6, Issue 2 , June 2017, , Pages 121-128

http://dx.doi.org/10.22105/riej.2017.49171

Abstract
  This paper formulates a competitive supply chain network throughout a mixed integer linear programming problem, considering demand uncertainty and retailers risk averseness. That is, makes the model more realistic in comparison with the others. Employed conditional value at risk method through the data-driven ...  Read More

Computational modelling
Amplified black hole algorithm for real power loss reduction

L. Kanagasabai

Volume 9, Issue 2 , June 2020, , Pages 130-142

http://dx.doi.org/10.22105/riej.2020.214468.1114

Abstract
  This work presents Amplified Black Hole Algorithm (ABHA) for solving optimal reactive power problem. In the projected approach ABHA, Gravitational Search Algorithm (GSA) is merged with Black Hole Algorithm (BHA). Power loss reduction is the key objective in the proposed work. The gravitational force ...  Read More

Total quality management and quality engineering
Simultaneous optimization of quantitative and ordinal responses using Taguchi method

S. Pal; S. Gauri

Volume 7, Issue 2 , September 2018, , Pages 184-205

http://dx.doi.org/10.22105/riej.2018.127858.1039

Abstract
  In the real world, the overall quality of a product is often represented partly by the measured values of some quantitative variables and partly by the observed values of some ordinal variables. The settings for the manufacturing processes of such products are required to be optimized considering the ...  Read More

Operations Research
A MOLFP Method for Solving Linear Fractional Programming Under Fuzzy Environment

S.K. Das; T. Mandal

Volume 6, Issue 3 , November 2017, , Pages 202-213

http://dx.doi.org/10.22105/riej.2017.92950.1002

Abstract
  In this paper, a solution procedure is proposed to solve Fully Fuzzy Linear Fractional Programming (FFLFP) problem where all the variables and parameters are triangular fuzzy numbers. Here, FFLFP problem transformed into an equivalent Multi- Objective Linear Fractional Programming (MOLFP) problem. Then ...  Read More

An optimization model for cold chain food distribution

A. K. Garside

Volume 8, Issue 3 , September 2019, , Pages 243-253

http://dx.doi.org/10.22105/riej.2019.202178.1097

Abstract
  Food product has a characteristic of continuous quality deterioration until the food is consumed. Cold chain distribution can improve the sustainability of the product quality but requires a more significant investment for storage facilities and vehicles as well as higher operation cost to control the ...  Read More

Fuzzy optimization
Modified Method for Solving Fully Fuzzy Linear Programming Problem with Triangular Fuzzy Numbers

S. K. Das

Volume 6, Issue 4 , December 2017, , Pages 293-311

http://dx.doi.org/10.22105/riej.2017.101594.1024

Abstract
  The Fuzzy Linear Programming problem has been used as an important planning tool for the different disciplines such as engineering, business, finance, economics, etc. In this paper, we proposed a modified algorithm to find the fuzzy optimal solution of fully fuzzy linear programming problems with equality ...  Read More