A reliability-centred maintenance strategy based on maintenance-free operating period philosophy and total lifetime operating cost analysis

Abstract

Maintenance intervention is necessary for the equipment, such as aircraft structures and systems, to maintain their operational performance status during their lifetime. Generally maintenance costs make a significant contribution to overall operating costs. Accordingly, developing an optimal maintenance strategy to minimize maintenance costs and total lifetime operating cost (TLOC) is a critical task. This article proposes a methodology for the optimization of a reliability-centred maintenance strategy based on maintenance-free operating period (MFOP) philosophy by considering the TLOC. The method can be used to evaluate the TLOC of alternative maintenance strategies and determine the optimal maintenance interval while meeting the proposed reliability requirements. The method is also suitable for evaluating and optimizing the MFOP-based reliability design of the products. An example based on line replaceable unit replacement strategy is introduced to illustrate the proposed maintenance strategy optimization approach. And a sensitivity analysis on the TLOC index for each of the two reliability requirement parameters is also performed.

Determining Interval Time of Maintenance in Bosowa Cement Indonesia using Reliability Method

“…This result has been considering by Long et al (2009) in their research. They were using MFOP philosophy and TLOC analysis to optimize the maintenance strategy in order to good balance cost and reliability useful life [7].…”

“…They were using MFOP philosophy and TLOC analysis to optimize the maintenance strategy in order to good balance cost and reliability useful life [7]. Zeng et al (2015) was studied to predict the probabilistic reliability by using PoF-based models to determine the TTF (time-to-failure).…”

Application of the Aviation Derived Maintenance Free Operating Period Concept in the South African Mining Industry

“…Relf [12] points out that the MTBF methodology conveys the impression that there is a certain 'allowable' level of failure that can be classified as random. It can also be seen that MTBF accepts failure and cannot be accurately forecast and avoided [23]; it therefore has a negative impact, as it induces unscheduled maintenance activities that, in turn, negatively impact the total life operating cost of the system. Trindade and Nathan [22] very clearly state that there is a need for a better reliability metric that accounts for trends in failure data.…”

“…Long [23] mentions that the MFOP methodology drives change in three areas: design, operation, and maintenance planning. Three main pillars are used by MFOP to achieve success in an operating environment with minimal maintenance: failure anticipation, avoidance, and maintenance delay.…”

Performance deterioration modeling and optimal preventive maintenance strategy under scheduled servicing subject to mission time

“…Especially for the aircraft, because of its often fatal and costly consequences of failure, one of the most important goals of the maintenance is to ensure safety, characterized by reliability or availability indexes generally. 1,2 With the aim of postponing the reliability decrease speed and restoring system's operational performance, the aeronautic facility is usually subject to periodical servicing during its life cycle, such as engine tune-up and aeronautical instrument emendation. As a result, the preventive maintenance strategy considering scheduled servicing is widely used to decline failures and reduce high maintenance cost.…”