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Reliability parameter estimation of repairable systems with imperfect maintenance, repair and overhaul

Garima Sharma (Subir Chowdhury School of Quality and Reliability, Indian Institute of Technology Kharagpur, Kharagpur, India)
Rajiv Nandan Rai (Subir Chowdhury School of Quality and Reliability, Indian Institute of Technology Kharagpur, Kharagpur, India)

International Journal of Quality & Reliability Management

ISSN: 0265-671X

Article publication date: 19 August 2020

Issue publication date: 16 March 2021

209

Abstract

Purpose

Industries generally require good maintenance, repair and overhaul (MRO) facilities. Maintenance activities at MRO cover the normal scheduled check-ups known as scheduled preventive maintenance (SPM) whereas an overhaul reviews and rejuvenates the complete system at a scheduled time. The literature is reasonably stocked with reliability modelling of repairable systems considering both the corrective maintenance (CM) and SPM as imperfect. However, in all these situations the overhaul is modelled as perfect repair. Thus, the purpose of this research paper is to develop a mathematical model for the estimation of reliability parameters considering the complete MRO as imperfect.

Design/methodology/approach

The paper proposes arithmetic reduction of age (Kijima I) based virtual age model to estimate reliability parameters by considering the complete MRO as imperfect and provides the likelihood and log-likelihood functions for parameter estimation of the proposed model and also presents the various extensions of the proposed model.

Findings

For analysis, two real-time data sets of two components, i.e. turbostarter and plunger pump are considered. The analysis mainly focuses on intensity function and availability of components. The availability analysis of the components directly affects the cost analysis. It is very important to analyze the realistic trend of availability, and the comparative analysis shows that the assumption of perfect overhaul overestimates and minimal overhaul underestimates the performance of the components whereas assumption of imperfect overhaul portraits more sensible deteriorating and availability trend of the components.

Originality/value

The proposed methodology in this paper is a novice and not available in the literature.

Keywords

Citation

Sharma, G. and Rai, R.N. (2021), "Reliability parameter estimation of repairable systems with imperfect maintenance, repair and overhaul", International Journal of Quality & Reliability Management, Vol. 38 No. 4, pp. 892-907. https://doi.org/10.1108/IJQRM-05-2019-0139

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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