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.

USING THE PHASE METHOD TO MODEL DEGRADATION AND MAINTENANCE EFFICIENCY

2003 ◽  
Vol 10 (04) ◽  
pp. 383-405 ◽  
Author(s):  
YANNICK LEFEBVRE
Keyword(s):  
Em Algorithm ◽  
Preventive Maintenance ◽  
Phase Method ◽  
Repairable System ◽  
Maintenance Policy ◽  
Corrective Maintenance ◽  
State Process ◽  
The Em Algorithm ◽  
Preventive Maintenance Policy ◽  
Ageing Phenomenon

We consider a repairable system that progressively wears out. Instantaneous preventive and corrective maintenance actions are carried out to slow down the ageing phenomenon. Our aim is to fit a multi-state process which describes degradation and maintenance efficiency. We show how to use the EM algorithm to estimate the parameters of the model, assuming that the preventive maintenance policy is known and that maintenance times are observed.

AN OPTIMAL BLOCK PREVENTIVE MAINTENANCE POLICY FOR A MULTI-UNIT SYSTEM CONSIDERING IMPERFECT MAINTENANCE

2009 ◽  
Vol 26 (06) ◽  
pp. 831-847 ◽  
Author(s):  
J. H. PARK ◽  
S. C. LEE ◽  
J. W. HONG ◽  
C. H. LIE
Keyword(s):  
Preventive Maintenance ◽  
Sensitivity Analyses ◽  
Model Parameters ◽  
Imperfect Maintenance ◽  
Maintenance Policy ◽  
Periodic Inspection ◽  
Unit System ◽  
Optimal Maintenance ◽  
Optimal Maintenance Policy ◽  
Preventive Maintenance Policy

A block preventive maintenance (PM) policy for a multi-unit system composed of identical units is investigated in this paper. The block PM model of this paper considers periodic inspection and periodic imperfect maintenance. The imperfect maintenance effects are formulated using improvement factor and age reduction model. We define variables of maintenance policy as the inspection period and the PM period and obtain an optimal maintenance policy which minimizes the average total cost. A numerical example is presented, and some sensitivity analyses for model parameters are also investigated.

scholarly journals Vulnerability based management of water resources systems

2004 ◽  
Vol 6 (2) ◽  
pp. 133-156 ◽  
Author(s):  
V. K. Kanakoudis
Keyword(s):  
Water Supply ◽  
Preventive Maintenance ◽  
Water System ◽  
Supply System ◽  
Water Supply System ◽  
Maintenance Policy ◽  
Supply Networks ◽  
Water Resources Systems ◽  
Maintenance Schedule ◽  
Preventive Maintenance Policy

Must the water networks be fail-proof or must they remain safe during a failure? What must water system managers try to achieve? The present paper introduces a methodology for the hierarchical analysis (in time and space) of the preventive maintenance policy of water supply networks, using water supply system performance indices. This is being accomplished through a technical–economic analysis that takes into account all kinds of costs referring to the repair or replacement of trouble-causing parts of the water supply network. The optimal preventive maintenance schedule suggested by the methodology is compared with the empirically based maintenance policy applied to the Athens water supply system.

scholarly journals Preventive maintenance policy on leasing by considering the usage rate

2018 ◽  
Vol 204 ◽  
pp. 02016
Author(s):  
Moh. Jufriyanto ◽  
Nani Kurniati ◽  
Ade Supriatna
Keyword(s):  
Preventive Maintenance ◽  
Failure Time ◽  
Equipment Failure ◽  
Maintenance Policy ◽  
Time Duration ◽  
Maintenance Costs ◽  
Operational Conditions ◽  
Penalty Cost ◽  
Usage Rate ◽  
Preventive Maintenance Policy

The needs of the consumers about the functionality of a product and increase maintenance costs of equipment caused the prices of products and treatments to be expensive. Therefore, the company considers the lease rather than buy it. Leasing provides interesting strategy when dealing with expensive equipment. Policy maintenance that is done to the product that has decreased performance. Minimum repair done to fix failed equipment in order to return to operational condition, while imperfect preventive maintenance to improve the operational conditions of the equipment to avoid failure. Time duration for a minimum repair neglected. The lessor will charge a penalty (penalty cost) if the lease equipment failure. Mathematical model built for the minimization cost of maintenance policy. In the final part, the numerical experiment are given to show the maintenance policy taking into account the rate of usage (usage rate) by knowing the minimization the resulting costs.

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