Availability and cost assessment of systems with dormant failure undergoing sequential inspections
Journal of Quality in Maintenance Engineering
ISSN: 1355-2511
Article publication date: 1 April 2021
Issue publication date: 28 June 2022
Abstract
Purpose
The system encountering dormant failure subject to sequential inspections is modeled and the emphasis is made on determining the availability and long-run average cost rate for the model. The derived results are then utilized to obtain the optimal inspection period minimizing the cost.
Design/methodology/approach
Explicitly, a system with a functional and a failed state is taken into account. Inspections are performed to reveal the dormant failures and are assumed to be carried out at time T, T + aT, T + aT+a2 T, … where 0 < a = 1 in each cycle. Perfect repairs taking random times are performed if the system is found in a failed state during any inspection.
Findings
Some theorems on the point availability, limiting availability and long-run average cost rate are obtained in the study. An illustration is shown to explain the results obtained in the proposed work. The effect of inspection time on the availability and cost rate is also analyzed graphically.
Originality/value
The availability and cost rate for a system with dormant failure under a sequential inspection policy are figured out unlike previous research.
Keywords
Acknowledgements
The authors would like to thank the editor and the reviewers for providing valuable suggestions and comments which helped in improving the quality of the paper.Funding: The work presented in this research paper is assisted by grants to the first author via Junior Research Fellowship (JRF) from Council of Scientific and Industrial Research (CSIR), India. Sanction Letter No. - 09/171(0137)/2019- EMR-1.
Citation
Pant, H. and Singh, S.B. (2022), "Availability and cost assessment of systems with dormant failure undergoing sequential inspections", Journal of Quality in Maintenance Engineering, Vol. 28 No. 3, pp. 533-544. https://doi.org/10.1108/JQME-10-2020-0112
Publisher
:Emerald Publishing Limited
Copyright © 2021, Emerald Publishing Limited