Quality technology and quantitative management, Year (2026-3)

Title : ( A new warranty plan combining renewal and a limited number of repair policies )

Authors: Fatemeh Hooti , Jafar Ahmadi , Maria Longobardi ,

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Abstract

‎We propose an extended two-dimensional warranty policy that combines a renewing free-replacement warranty with a limited number of repairs during the warranty period‎. ‎The system is assumed to experience two types of failures‎: ‎type-I failures‎, ‎which are repairable through minimal repair‎, ‎and type-II failures‎, ‎which are non-repairable or catastrophic and require replacement‎. ‎In the proposed warranty scheme‎, ‎type-II failures are covered by a renewing free-replacement policy during the initial warranty period‎, ‎while type-I failures are subject to an upper limit on the number of allowable occurrences‎. ‎If the number of type-I failures remains below this threshold‎, ‎the warranty is extended up to a predetermined time horizon‎. ‎To identify the optimal warranty strategy‎, ‎an expected total cost function, incorporating the sale price function, is developed as the model\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s objective function‎. ‎Numerical and graphical analyses are conducted under the assumption that the system lifetime follows a Weibull distribution‎. ‎Finally‎, ‎the applicability of the proposed policy is demonstrated using two real data sets‎.

Keywords

, Warranty policy‎, ‎Free replacement warranty‎, ‎Renewing warranty‎, ‎Extended warranty‎, ‎Limited number of repairs‎, ‎Sale price‎, ‎Cost function.
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@article{paperid:1106864,
author = {Hooti, Fatemeh and Ahmadi, Jafar and ماریا لنگباردی},
title = {A new warranty plan combining renewal and a limited number of repair policies},
journal = {Quality technology and quantitative management},
year = {2026},
month = {March},
issn = {1684-3703},
keywords = {Warranty policy‎; ‎Free replacement warranty‎; ‎Renewing warranty‎; ‎Extended warranty‎; ‎Limited number of repairs‎; ‎Sale price‎; ‎Cost function.},
}

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%0 Journal Article
%T A new warranty plan combining renewal and a limited number of repair policies
%A Hooti, Fatemeh
%A Ahmadi, Jafar
%A ماریا لنگباردی
%J Quality technology and quantitative management
%@ 1684-3703
%D 2026

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