Scheduling
Development of a doctor scheduling system: a constraint satisfaction and penalty minimisation scheduling model

T. Chawasemerwa; I. W. Taifa; D. Hartmann

Volume 7, Issue 4 , December 2018, , Pages 396-422

http://dx.doi.org/10.22105/riej.2018.160257.1068

Abstract
  Doctor scheduling is a complex, costly and time-consuming exercise. This study develops a constraint satisfaction and penalty minimisation scheduling model for meeting ‘hard constraints’ and minimises the cost of violating ‘soft constraints’, i.e. the user inputs, the total number ...  Read More

Duplicate Genetic Algorithm for Scheduling a Bi-Objective Flexible Job Shop Problem

H. Mohammadi-Andargoli; R. Tavakkoli-Moghaddam; N. Shahsavari Pour; M.H. Abolhasani-Ashkezari

Volume 1, Issue 2 , July 2012, , Pages 10-26

Abstract
  This paper addresses the permutation of a flexible job shop problem that minimizes the makespan and total idleness as a bi-objective problem. This optimization problem is an NP-hard one because a large solution space allocated to it. We use a duplicate genetic algorithm (DGA) to solve the problem, which ...  Read More

Efficiency Evaluation and Ranking of the Research Center at the Ministry of Energy: A Data Envelopment Analysis Approach

M. Fallah; S.E. Najafi

Volume 1, Issue 1 , June 2012, , Pages 10-18

Abstract
  Evaluating the performance of the different departments in an organization or evaluating and comparing the performance of a single department over different time points may boost the organizational efficiency and the involved industry. Making the most efficient use of the existing resources to realize ...  Read More

The "5S" Strategy by Using PDCA Cycle for Continuous Improvement of the Manufacturing Processes in Agriculture Industry

B. Singh Sidhu; V. Kumar; A. Bajaj

Volume 2, Issue 3 , September 2013, , Pages 10-23

Abstract
  The global marketplace has witnessed an increased pressure from customers and competitors in manufacturing .In this age of agile manufacturing the global competition characterized by both technology push and market pull had forced the companies to achieve world-class performance through continuous improvement ...  Read More

Comprehensive Method to Determine Real Option Utilizing Probability Distribution

M. Modarres Yazdi; M. Shafiei; S.M. Sahihi Oskooyi

Volume 3, Issue 1 , May 2014, , Pages 11-25

Abstract
  Data envelopment analysis (DEA) is a non-parametric analytical methodology widely used in efficiency measurement of decision making units (DMUs). Conventionally, after identifying the efficient frontier, each DMU is compared to this frontier and classified as efficient or inefficient. This thesis introduces ...  Read More

Estimating Duration of Projects Manual Tasks Using MODAPTS plus Method

H. Golpira

Volume 2, Issue 1 , February 2013, , Pages 12-19

Abstract
  Estimating duration of projects manual tasks is one of the crucial concepts and problems of their management and control. Methods have been used to achieve this estimation are so difficult, time consumer and basically unreliable. In this paper a new method is introduced based on modular arrangement of ...  Read More

Identifying Buyer-Supplier Conflict in Collaborative Process New Product Development

J. Razmi; D. Haghighi

Volume 3, Issue 2 , May 2014, , Pages 12-23

Abstract
  Every organizational entity, whether operated for profit or not, must purchase goods and/or contract for services to meet the needs of its customers, clients, and stakeholders. As a result of the dynamics that occur in this process, the potential for buyer-supplier conflict is extremely high and is in ...  Read More

Deriving Priorities the Alternatives in an Analytic Hierarchy Process

S. Khoshfetrat; F. Hosseinzadeh-Lotfi

Volume 3, Issue 4 , December 2014, , Pages 13-20

Abstract
  The data envelopment analysis (DEA) is a mathematical programming technique, which is used for evaluating relative efficiency of decision making units (DMUs). However, the DEA does not provide more information about the efficient DMUs. Recently, some researchers have been carried out in the background ...  Read More

An ERP Selection Combination Model under Uncertainty: A Grey-BSCAHP-Entropy Model

M. H. Kamfiroozi; A. Bonyadi Naeini

Volume 3, Issue 3 , September 2014, , Pages 13-23

Abstract
  An enterprise resource planning (ERP) software can help organizations and firms in their activities like: production planning, purchase, human resource, finance, sales, inventory control and etc. Selection of an ERP is mentioned as a multi-criteria decision making (MCDM) problem. However, several MCDM-models ...  Read More

Operations Research
Modified solution for neutrosophic linear programming problems with mixed constraints

S. K. Das; J. K. Dash

Volume 9, Issue 1 , March 2020, , Pages 13-24

http://dx.doi.org/10.22105/riej.2020.224198.1127

Abstract
  Neutrosophic Linear Programming (NLP) issues is presently extensive applications in science and engineering. The primary commitment right now to manage the NLP problem where the coefficients are neutrosophic triangular numbers with blended requirements. The current method [20] are viewed as just imbalance ...  Read More

Data Envelopment Analysis Based on MPSS Efficient and Inefficient Frontiers

F. Piran; F Hosseinzadeh Lotfi; M. Rostami-Malkhalifeh

Volume 2, Issue 4 , December 2013, , Pages 15-25

Abstract
  Data envelopment analysis (DEA) is a non-parametric analytical methodology widely used in efficiency measurement of decision making units (DMUs). Conventionally, after identifying the efficient frontier, each DMU is compared to this frontier and classified as efficient or inefficient. This thesis introduces ...  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

http://dx.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

Economical Evaluation of Subsidy Omitting Effect on the Renewable Energy Position in Power Generation in Iran

M. Barimani; A. Salnazaryan

Volume 2, Issue 2 , June 2013, , Pages 17-34

Abstract
  According to Reforms in electricity industry and privatization in Iran, "financial provision sources" is introduced as the most important barrier in enhancing electricity production through renewable energy. In this article by measuring and comparing Marginal Cost and electricity production through every ...  Read More

Manufacturing and Logistics
The Role of Integration QFDVA in New Product Design to Achieve World-Class Manufacturing

H. Farsijani; M. Shafiei Nikabadi; S. Keshavarz Dastak

Volume 6, Issue 1 , March 2017, , Pages 17-38

http://dx.doi.org/10.22105/riej.2017.48023

Abstract
  In the competitive economy of today, those companies are to succeed that can design efficiently and produce productions that would be preferred by its customers over those of their competitors and Those companies which desire to find for their performance a position in world-class should have the capability ...  Read More

Game theory
On solving two-person zero-sum fuzzy matrix games via linear programming approach

H. A. Khalifa

Volume 8, Issue 1 , April 2019, , Pages 17-27

http://dx.doi.org/10.22105/riej.2019.170067.1075

Abstract
  In this paper, a two-person zero-sum matrix game with fuzzy numbers payoff is introduced. Using the fuzzy number comparison introduced by Rouben's method (1991), the fuzzy payoff is converted into the corresponding deterministic payoff. Then, for each player, a linear programming problem is formulated. ...  Read More

Reliability and Quality Engineering
A Computer Simulation Model for Reliability Estimation of a Complex System

S. Raissi; Sh. Ebadi

Volume 7, Issue 1 , April 2018, , Pages 19-31

http://dx.doi.org/10.22105/riej.2018.109017.1032

Abstract
  In today's competitive world, preventing from probable breakdowns can be act as a powerful leverage for managers. They are faced with large complex systems. Hence, the realistic estimation of the reliability of such systems has become increasingly important and it is a vital complicated task especially ...  Read More

Optimization of Emergency Management System in a Construction Organization in India

S.V.S. Raja Prasad; Y.V.S.S.S.V. Prasad Rao

Volume 1, Issue 3 , December 2012, , Pages 26-38

Abstract
  It is not possible to eliminate the workplace emergencies but can be mitigated by effective planning. In all the construction organizations the possibility of facing emergencies is common. The objective of emergency management is to minimize losses that result out of emergencies. The employees in construction ...  Read More

Industrial Management
Excessive sound noise risk assessment in textile mills of an Ethiopian-Kombolcha textile industry share company

M. A. Ejigu

Volume 8, Issue 2 , June 2019, , Pages 105-114

http://dx.doi.org/10.22105/riej.2019.169138.1071

Abstract
  In countries like Ethiopia, the textile industries are facing a big problem of sound noise pollution. In these countries, the industrial hearing conservation program is not yet clearly developed. Thus, characterizing excessive noise pollutions in textile industries have been the aim of this research ...  Read More

Total quality management and quality engineering
Extracting of Relationships Between Modern Management Techniques in SME Manufacturing Support and Procurement of Equipment for Oil Companies of Iran

H. Zandhessami; A. Rahgozar

Volume 6, Issue 2 , June 2017, , Pages 106-120

http://dx.doi.org/10.22105/riej.2017.49164

Abstract
  The organization can fully benefit from efforts to improve quality through programs such as total quality management. Just-in-time and total quality management combine to support the successful implementation of agile manufacturing programs which, in turn, result in the organization’s ability to ...  Read More

Case studies in industry and services
Application of line balancing heuristics for achieving an effective layout: a case study.

T. Ahmed; N. Sakib; R. M. Hridoy; A. T. Shams

Volume 9, Issue 2 , June 2020, , Pages 114-129

http://dx.doi.org/10.22105/riej.2020.234612.1134

Abstract
  This project is a case study conducted in a manufacturing company aiming at improving its productivity using line balancing techniques. Waste reduction, especially the time waste, is an important factor to shrink the manufacturing cost. The main purpose of this project is to suggest a better line balancing ...  Read More

Forecasting, production planning, and control
Solving a new multi-objective resource constrained project scheduling problem by SAICA and compare it with DE method

A. Esmaili Dooki; p. Bolhasani; A. Alam Tabriz

Volume 7, Issue 2 , September 2018, , Pages 147-183

http://dx.doi.org/10.22105/riej.2018.127733.1038

Abstract
  Nowadays the Resource Constrained Project Scheduling Problem (RCPSP) has triggered a substantially significant issue among scheduling problems. The purpose of RCPSP is minimizing the duration of the projects due to both limited available resources and precedence constraints. Indeed, it attempts to consume ...  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

http://dx.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

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

Sh. Haldar; Ch. L. Karmaker; Sk. R. Hossain

Volume 8, Issue 3 , September 2019, , Pages 225-242

http://dx.doi.org/10.22105/riej.2018.149536.1060

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

Engineering Optimization
Scheduling Project Crashing Time Using Linear Programming Approach: Case Study

K. Chitra; P. Halder

Volume 6, Issue 4 , December 2017, , Pages 283-292

http://dx.doi.org/10.22105/riej.2017.96572.1010

Abstract
  In today’s competitive environment completing a project within time and budget, is very challenging task for the project managers. This aim of this study is to develop a model that finds a proper trade-off between time and cost to expedite the execution process. Critical path method (CPM) is used ...  Read More

Facility location, layout, design, and materials handling
Facility location selection for plastic manufacturing industry in Bangladesh by using AHP method

M. S. Rahman; M. I. Ali; U. Hossain; T. K. Mondal

Volume 7, Issue 3 , November 2018, , Pages 307-319

http://dx.doi.org/10.22105/riej.2018.135742.1049

Abstract
  In present’s, the location selection problems play an important role for the top-level manager or entrepreneur for opening a new manufacturing company or relocate or expand their operation. As an engineered material, the plastic is used for manufacturing a wide variety of domestic products. For ...  Read More