129330 20231215094308.0 doi 10.1016/j.ress.2020.106949 sideral 117710 ART-2020-117710 eng Badía, F.G. Universidad de Zaragoza (orcid)0000-0002-6651-3306 An study of cost effective maintenance policies: Age replacement versus replacement after N minimal repairs 2020 In this paper we consider the inspection and maintenance of a system under two types of age-dependent failures, revealed minor failures (R) and unrevealed catastrophic failures (U). Periodic inspections every T units of time are carried out to detect U failures, leading to the system replacement when one is discovered. R failures are followed by a minor repair. In addition the system is preventively replaced at MT or after the Nth R failure whichever comes first. The costs of minimal repair and replacement after N minor failures depend on age and history of failures. Non-perfect inspections are assumed, providing false positives when no U failure has happened or false negatives when a U failure is present. The long-run cost per unit of time along with the optimum policy (T*, M*, N*) are obtained. We explore conditions under which both strategies of preventive maintenance are profitable, comparing with suboptimal policies when only one of them is performed. Maintenance of infrastructures illustrates the model conditions. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MINECO/MTM2015-63978-P info:eu-repo/grantAgreement/ES/MINECO/PGC2018-094964-B-100 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 6.188 2020 OPERATIONS RESEARCH & MANAGEMENT SCIENCE 11 / 84 = 0.131 2020 Q1 T1 ENGINEERING, INDUSTRIAL 11 / 49 = 0.224 2020 Q1 T1 1.76 2020 Applied Mathematics 2020 Q1 Safety, Risk, Reliability and Quality 2020 Q1 Industrial and Manufacturing Engineering 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Berrade, M.D. Universidad de Zaragoza (orcid)0000-0002-8035-5762 Lee, H. 2007 265 Universidad de Zaragoza Dpto. Métodos Estadísticos Área Estadís. Investig. Opera. 201 (2020), 106949 [15 pp.] Reliab. eng. syst. saf. Reliability Engineering and System Safety 0951-8320 578013 http://zaguan.unizar.es/record/129330/files/texto_completo.pdf Postprint 982123 http://zaguan.unizar.es/record/129330/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:129330 articulos driver 2023-12-14-13:17:56 ARTICLE