Comparison between maintenance policies based on q -Weibull and Weibull models
International Journal of Quality & Reliability Management
ISSN: 0265-671X
Article publication date: 13 April 2021
Issue publication date: 14 January 2022
Abstract
Purpose
The purpose of this article is to compare maintenance policies based on Weibull and q-Weibull models.
Design/methodology/approach
This paper uses analytical developments, several figures and tables for graphical and numerical comparison. Previously published hydropower equipment data are used as examples.
Findings
Models for optimal maintenance interval determination based on q-Weibull distribution were defined. Closed-form expressions were found, and this allows the application of the method with small computational effort.
Practical implications
The use of the q-Weibull model to guide the definition of maintenance strategy allows decision-making to be more consistent with sample data. The flexibility of the q-Weibull model is able to produce failure rate modeling with five different formats: decreasing, constant, increasing, unimodal and U-shaped. In this way, the maintenance strategies resulting from this model should be more assertive.
Originality/value
Expressions for determining the optimal interval of preventive maintenance were deduced from q-Weibull distribution. Expected costs per maintenance cycle of Brazilian hydropower equipment were calculated with q-Weibull and Weibull distributions. These results were compared in terms of absolute values and trends. Although a large number of works on corrective and preventive maintenance have been proposed, no applications of the q-Weibull distribution were found in literature.
Keywords
Acknowledgements
The authors would like to thank Brazilian National Electric Energy Agency (ANEEL) for the financial support to the development of this research (COPEL-Paranaense Company of Energy, Grant PD-06491-0391-2015).
Citation
Assis, E.M., Figueirôa Filho, C.L.S., Lima, G.C., Salles, G.M.d.O. and Pinto, A. (2022), "Comparison between maintenance policies based on
Publisher
:Emerald Publishing Limited
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