Optimum post-warranty random maintenance policy based on working cycles

Abstract

Abstract: By incorporating both limited number of working cycles and a refund into renewing pro-rata replacement warranty (RPRW), a two-dimensional renewing pro-rata replacement warranty with refund (2DRPRW with R) is proposed, which can help manufacturers to ensure product reliability performance. Besides, by extending 2DRPRW with R to the post-warranty maintenance, a post-warranty random maintenance is modeled from consumers’ perspective to sustain post-warranty reliability, which is called random periodic replacement (RPR) policy. The cost rate model produced by RPR is constructed, and some special cost rates are obtained. Finally, the sensitivities of the proposed approaches are analyzed in numerical experiments. It shows that the warranty cost of 2DRPRW with R can be controlled by limiting the number of working cycles compared to RPRW.

Key words: working cycle, warranty, post-warranty reliability, random periodic replacement, cost rate

CLC Number:

O213

SHANG Li-jun, DU Yong-jun, ZHANG Bi-wen. Optimum post-warranty random maintenance policy based on working cycles[J]. Journal of Lanzhou University of Technology, 2023, 49(3): 153-164.

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