1. Solving product mix problem in multiple constraints environment using goal programming

Fahimeh Tanhaie; Nasim Nahavandi

Volume 4, Issue 1 , Winter and Spring 2017, Pages 1-12


  The theory of constraints is an approach to production planning and control that emphasizes on the constraints to increase throughput by effectively managing constraint resources. One application in theory of constraints is product mix decision. Product mix influences the performance measures in multi-product ...  Read More

2. Analyzing and prioritization of HSE performance evaluation measures utilizing Fuzzy ANP (Case studies: Iran Khodro and Tabriz Petrochemical)

Hamed Soleimani; Tahere Fattahi Ferdos

Volume 4, Issue 1 , Winter and Spring 2017, Pages 13-33


  Today, HSE (health, safety, and environment) systems play a vital role in green and sustainable aspects of the companies. However, performance evaluation of HSE systems is a crucial issue in industry and academia. This paper tries to identify and prioritize the effective factors in HSE performance in ...  Read More

3. Designing the optimum plan for regenerating the pedestrian network of historic districts using bi-level programming (Case study: Historical-Cultural district of Tehran, Iran)

Sajed Rastbin; Farhang Mozaffar; Mostafa Behzadfar; Mehrdad Gholami Shahbandi

Volume 4, Issue 1 , Winter and Spring 2017, Pages 34-54


  Motorized transportation systems in the urban areas witnessed huge developments in the infrastructures thanks to the advances in various aspects of technology. This urbanization revolution has its own pros and cons. The resulting dominance of vehicles has limited the presence of people in public places ...  Read More

4. A fuzzy approach to reliability analysis

Sara Tavassoli; Farnaz Shahpar; Taha-Hossein Hejazi

Volume 4, Issue 1 , Winter and Spring 2017, Pages 55-68


  Most of the existing approaches for fuzzy reliability analysis are based on fuzzy probability.  The aim of this paper is to describe fuzzy reliability using fuzzy differential equation. The reliability of a system in real world applications is affected by some uncertain parameters. Fuzzy reliability ...  Read More

5. Integrated modeling and solving the resource allocation problem and task scheduling in the cloud computing environment

Maryam Shams; Ahmad Jafarzadeh Afshari; Amir Khakbaz

Volume 4, Issue 1 , Winter and Spring 2017, Pages 69-89


  Cloud computing is considered to be a new service provider technology for users and businesses. However, the cloud environment is facing a number of challenges. Resource allocation in a way that is optimum for users and cloud providers is difficult because of lack of data sharing between them. On the ...  Read More

6. An innovative algorithm for planning and scheduling healthcare units with the aim of reducing the length of stay for patients (Case study: Cardiac SurgeryWard of Razavi Hospital of Mashhad)

Mohammad Sadeghi; Parisa Niloofar; Mohsen Ziaee; Zahra Mojaradi

Volume 4, Issue 1 , Winter and Spring 2017, Pages 90-104


  One of the key applications of operational research in health systems management is to improve the mechanism of resource allocation and program planning in order to increase the system efficiency. This study seeks to offer an innovative method for the planning and scheduling of health service units with ...  Read More