Performance-oriented preventive maintenance policy for deteriorating single-machine manufacturing systems

摘要

For manufacturing systems, reliability and product quality are two essential performance indicators. These two indicators usually decline as the machine deteriorates with age and usage. Preventive maintenance (PM) is effective on mitigating the machine deterioration and thus improves both the reliability and product quality. In this case, this paper proposes a performance-oriented PM policy for the single-machine systems. PM is triggered whenever the machine failure rate reaches the failure rate threshold (FRT), or the product defective rate reaches the defective rate threshold (DRT). The optimal PM plan is obtained by minimizing the total cost, including PM cost, minimal repair cost and quality loss, with FRT and DRT as the decision parameters. The defective rate and quality loss are quantitatively evaluated based on a process model developed to mathematically describe the impact of machine deterioration on product quality. The effectiveness and superior performance of the proposed PM policy is demonstrated through a case study.