Title: The issue of maintenance and repairment of machines in a production system with the possibility of enhancing the performance of workers: a numerical illustration

Authors: Mansoureh Ramezani Farani; Mohammad Mohammadi; Ali Ghodratnama

Addresses: Department of Industrial Engineering, Faculty of Engineering, Kharazmi University, 15719-14911 Tehran, Iran ' Department of Industrial Engineering, Faculty of Engineering, Kharazmi University, 15719-14911 Tehran, Iran ' Department of Industrial Engineering, Faculty of Engineering, Kharazmi University, 15719-14911 Tehran, Iran

Abstract: Production planning is essential for every production system. Production planning is defined as allocating available resources to be processed through operations. The purpose of production planning is to optimise costs of the production system. In this article, we first provided a mathematical model in which enhancing the performance of workers and maintenance and repair of machines are considered. The model follows the following objectives: minimising the costs associated with the holding and backorders, enhancing the performance of workers, maintenance and repair of machines, wages, machines' use cost and the cost of changing the machine usage. Subsequently, the model was solved using GAMS optimisation software. Given the problem solving complexity, this problem is presented as NP-hard problems. Thus, a genetic algorithm was presented to solve the problem. The results illustrate that genetic algorithm is efficient and effective.

Keywords: production planning; machine maintenance and repair; worker performance enhancement; mathematical model; genetic algorithm.

DOI: 10.1504/IJMOR.2017.084161

International Journal of Mathematics in Operational Research, 2017 Vol.10 No.4, pp.462 - 484

Received: 23 Jun 2015
Accepted: 06 Aug 2015
Published online: 16 May 2017 *

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