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Warranty costs: An age‐dependent failure/repair model
Author(s) -
Dimitrov Boyan,
Chukova Stefanka,
Khalil Zohel
Publication year - 2004
Publication title -
naval research logistics (nrl)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 68
eISSN - 1520-6750
pISSN - 0894-069X
DOI - 10.1002/nav.20037
Subject(s) - warranty , product (mathematics) , failure rate , hazard , function (biology) , poisson distribution , computer science , poisson process , reliability engineering , operations research , mathematics , engineering , statistics , chemistry , geometry , organic chemistry , evolutionary biology , political science , law , biology
An age‐dependent repair model is proposed. The notion of the “calendar age” of the product and the degree of repair are used to define the virtual age of the product. The virtual failure rate function and the virtual hazard function related to the lifetime of the product are discussed. Under a nonhomogeneous Poisson process scenario the expected warranty costs for repairable products associated with linear pro‐rata, nonrenewing free replacement and renewing free replacement warranties are evaluated. Illustration of the results is given by numerical and graphical examples. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004.