Abstract
The performance of equipment in workshop will deteriorate gradually with time. This paper presents a multi-stage preventive maintenance strategy model to solve the problem of maintenance scheduling subjected to the production requirement in the workshop. Two types of preventive maintenance were considered. Taking into account the penalty cost due to maintenance overtime and product quality problems, the model aims to minimize the total maintenance cost. Due to the limited resources, current production and maintenance calls for outsourcing to fulfil the demand. A maintenance scheduling model with partial outsourcing consideration is proposed and particle swarm optimization (PSO) algorithm is applied to obtain the optimal production sequence, outsourcing scheme and the preventive maintenance strategy. A case study is discussed to verify the efficiency and effectiveness of the proposed model. The results revealed that partial outsourcing strategy will save 17% of the total cost.
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