Addressing imperfect maintenance modelling uncertainty in unavailability and cost based optimization

Sánchez, Ana Isabel; Alberola, Sofía Carlos; Martorell, Sebastián; Sancho, M. T.

doi:10.1016/j.ress.2007.03.022

Cited by 73 publications

(56 citation statements)

References 27 publications

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“…• Sanchez et al [35] consider the problem of testing and maintenance activities optimization with uncertainty in the imperfect maintenance modelling. The proposed methodology is applied to a stand by safety-related system of a nuclear power plant.…”

Section: Imperfect Maintenance Literature Reviewmentioning

confidence: 99%

Imperfect Maintenance Models, from Theory to Practice

Carlo¹,

Arleo²

2017

System Reliability

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The role of maintenance in the industrial environment changed a lot in recent years, and today, it is a key function for long-term profitability in an organization. Many contributions were recently written by researchers on this topic. A lot of models were proposed to optimize maintenance activities while ensuring availability and high-quality requirements. In addition to the well-known classification of maintenance activities-preventive and corrective-in the last decades, a new classification emerged in the literature regarding the degree of system restoration after maintenance actions. Among them, the imperfect maintenance is one of the most studied maintenance types: it is defined as an action after which the system lies in a state somewhere between an "as good as new" state and its pre-maintenance condition "as bad as old." Most of the industrial companies usually operate with imperfect maintenance actions, even if the awareness in actual industrial context is limited. On the practical definition side, in particular, there are some real situations of imperfect maintenance: three main specific cases were identified, both from literature analysis and from experience. Considering these three implementations of imperfect maintenance actions and the main models proposed in the literature, we illustrate how to identify the most suitable model for each real case.

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Section: Imperfect Maintenance Literature Reviewmentioning

confidence: 99%

Imperfect Maintenance Models, from Theory to Practice

Carlo¹,

Arleo²

2017

System Reliability

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“…As proposed in [18,19], it is supposed the age of a component, w(t), evolves with chronological time, t. In addition, the effect of maintenance on the age of the component and on its reliability is included based on a model of imperfect maintenance. Imperfect maintenance models consider that each maintenance activity reduces the age of the component by some degree, depending on its effectiveness.…”

Section: Age-dependent Failure Rate Model Addressing Imperfect Maintementioning

confidence: 99%

“…[18,19]. The selection of the most appropriate model in each case depends on the component type, failure mechanism and sort of maintenance activity.…”

Section: Age-dependent Failure Rate Model Addressing Imperfect Maintementioning

confidence: 99%

“…In this paper, the linear ageing failure rate model has been considered, being this the simplest age-dependent reliability model [19]. This model assumes that the failure rate has a linear behaviour with component age departing form an initial reliability, inherently by design, which can be expressed as [9,19]:…”

Section: Proportional Age Reduction Based Ageing and Reliability Modelsmentioning

confidence: 99%

“…[18,19] but addressing now the several age-dependent failure rate contributions introduced in section 4.4, the component unavailability due to unreliability contributions can be evaluated using the following equations :…”

Section: Unreliability Contributionsmentioning

confidence: 99%

See 2 more Smart Citations

Ageing PSA incorporating effectiveness of maintenance and testing

Martón¹,

Sánchez²,

Martorell³

2015

Reliability Engineering & System Safety

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This paper proposes a new approach to Ageing Probabilistic Safety Assessment (APSA) modelling, which is intended to be used to support risk-informed decisions on the effectiveness of maintenance management programs and technical specification requirements of critical equipment of Nuclear Power Plants (NPP) within the framework of the Risk Informed Decision Making according to R.G. 1.174 principles. This approach focuses on the incorporation of not only equipment ageing but also effectiveness of maintenance and efficiency of surveillance testing explicitly into APSA models and data. An example of application is presented, which centers on a critical safety-related equipment of a NPP in order to evaluate the risk impact of considering different approaches to APSA and the combined effect of equipment ageing and maintenance and testing alternatives along NPP design life. The risk impact of the several alternatives is quantified and the results shows that such risk depends largely on the model parameters, such as ageing factor, maintenance effectiveness, test efficiency.

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Renewal Theory and Superimposed Renewal

2018

Reliability Engineering and Service

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Addressing imperfect maintenance modelling uncertainty in unavailability and cost based optimization

Cited by 73 publications

References 27 publications

Imperfect Maintenance Models, from Theory to Practice

Imperfect Maintenance Models, from Theory to Practice

Ageing PSA incorporating effectiveness of maintenance and testing

Renewal Theory and Superimposed Renewal

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