Estimating maintenance effectiveness of a repairable system under time-based preventive maintenance

2021 ◽  
pp. 107278
Author(s):  
A. Syamsundar ◽  
V.N.A. Naikan ◽  
Shaomin Wu
Keyword(s):  
Preventive Maintenance ◽  
Repairable System

Optimal sequential preventive maintenance policy for a repairable system with maintenance windows

2019 ◽  
Vol 234 (4) ◽  
pp. 963-977
Author(s):  
Wenke Gao
Keyword(s):  
Preventive Maintenance ◽  
Existence And Uniqueness ◽  
Optimal Solution ◽  
Intensity Function ◽  
Sensitivity Analyses ◽  
Repairable System ◽  
Maintenance Policy ◽  
Catastrophic Failures ◽  
Failure Intensity ◽  
Preventive Maintenance Policy

Optimization of sequential preventive maintenance has been widely studied. However, some issues need further discussion when considering certain real factors. Hence, an sequential preventive maintenance policy for a mono-unit repairable system with maintenance windows is proposed. The load strength and catastrophic failures of a system are considered in the reliability model, and an optimization of the SPM policy is rigorously proven by an analytical method. The existence and uniqueness of the optimal solution with a monotone increasing failure intensity function are presented in detail. The proof of theory indicates that the length of the maintenance window has an upper bound. Finally, a numerical example and some sensitivity analyses are given to illustrate the proposed sequential preventive maintenance policy. Results show that waste may occur when performing the general sequential preventive maintenance policy and may increase along with the length of the maintenance windows.

Optimum Maintenance Strategy of a Repairable System Under Long-Term Free Preventive Maintenance Warranty with Predicted Maintenance

2016 ◽  
Vol 23 (04) ◽  
pp. 1650016 ◽  
Author(s):  
Gwo-Liang Liao
Keyword(s):  
Preventive Maintenance ◽  
Repairable System ◽  
System Failure ◽  
Maintenance Strategy ◽  
Imperfect Maintenance ◽  
Maintenance Time ◽  
Special Cases ◽  
Periodic Maintenance ◽  
Time Periodic

In this paper, the optimum user’s maintenance strategy of a repairable system for free preventive maintenance (PM) warranty policy is proposed. This study considers predicted maintenance due to the system failure is likely occurring and requires repair during periodic maintenance time. Periodic maintenance can be classified as one of three types — imperfect PM, perfect PM and predicted maintenance. The probability that periodic maintenance is perfect PM or predicted maintenance depends on the number of imperfect maintenance operations conducted since the previous renewal cycle. The sellers offer free perfect and imperfect PM warranty. An optimal periodic maintenance time is determined by minimizing the total cost. Some special cases, implemented with machine learning and human learning, are given to demonstrate the feasibility of the proposed strategy. A numerical example is given.

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