This paper presents a maintenance policy for a system consisting of two units. Unit 1 is gradually deteriorating and is subject to soft failure. Unit 2 has a general lifetime distribution and is subject to hard failure. Condition of unit 1 of the system is monitored periodically and it is considered as failed when its deterioration level reaches or exceeds a critical level N . At the failure ti...

The definitions of optimal preventive and corrective maintenance of electric power distribution networks can be seen as a special case of a knapsack problem. This paper proposes a dynamic programming approach to deal with this problem. The approach is developed for one or more years of planning horizon. Case studies compare the optimal dynamic programming approach with an heuristic method.

Background, Context: Optimizing the process availability cannot be reached by reducing the global cost of the process life cycle when maintenance is not predictive. On the one hand, corrective maintenance is commonly used even if it has many limitations due to production stops and downtime, when a failure occurs; on the other hand, preventive maintenance is used to avoid any production stops an...

A system subject to degradation is considered. The modelled by a gamma process. condition-based maintenance policy with perfect corrective and an imperfect preventive actions proposed. cost derived considering Markov-renewal statistical inference of the parameters maximum likelihood method investigated. sensibility analysis different carried out perspectives are detailed.

In this paper, a method is proposed to improve the scheduled preventive maintenance of the system by assessing different kinds of availability and illustrated how the corrective maintenance data can be helpful to reschedule preventively maintained system. This method uses the concept of inherent availability to ensure to what extent maximum availability can be extended. The application of the p...

Many authors have studied repairable redundant system operating in different condition under the assumption that the system received corrective maintenance at failure and preventive maintenance before failure. However, little or no attention is paid on whether the system can receive minor and major maintenance when it is operating in a reduced capacity state. In this study we consider a redunda...

Corrective maintenance (CM) is carried out to correct failures while preventive (PM) avert failure. They both play an important role in asset management. Accurately estimating the effectiveness of PM needed as it has impact on system health Given failure times and related data, possible estimate maintenance. This paper proposes CM models based different combinations type out, estimates paramete...

in order to perform preventive maintenance (pm), two approaches have evolved in the literature. the traditional approach is based on the use of statistical and reliability analysis of equipment failure. under statistical-reliability (s-r)-based pm, the objective of achieving the minimum total cost is pursued by establishing fixed pm intervals, which are statistically optimal, at which to replac...