Condition-based maintenance policy for accelerated degradation production equipment considering imperfect maintenance

Under the constraint of manufacturer-defined preventive maintenance thresholds, this study considers the effects of equipment degradation on production equipment failure and product quality, and proposes a condition-based maintenance (CBM) policy for accelerated degradation production equipment due to imperfect maintenance with the objective of minimizing the average cost rate. The proposed CBM policy incorporates a non-fixed-period inspection plan and a preventive replacement policy. To prevent premature equipment failure, the inspection period for each maintenance cycle depends on the degradation rate and initial degradation state of each maintenance cycle. Moreover, in order to reduce the maintenance costs, including the preventive maintenance (PM) cost of the equipment and the repair cost of defective items, a threshold value for the number of imperfect preventive maintenance actions is set for timely preventive replacement of equipment. Finally, a numerical example is provided to verify the feasibility and effectiveness of the proposed CBM policy.