126873 20241125101155.0 doi 10.1016/j.cie.2023.109291 sideral 134144 ART-2023-134144 eng Berrade, M.D. Universidad de Zaragoza (orcid)0000-0002-8035-5762 Maintenance of systems with critical components. Prevention of early failures and wear-out 2023 Access copy available to the general public Unrestricted We present a model for inspection and maintenance of a system under two types of failures. Early failures (type I), affecting only a proportion p of systems, are due to a weak critical component detected by inspection. Type II failures are the result of the system ageing and preventive maintenance is used against them. The two novelties of this model are: (1) the use of a defective distribution to model strong components free of defects and thus immune to early failures. (2) the removal of the weak critical part once it is detected with no other type of rejuvenation of the system which constitutes an alternative to the minimal repair. We study the conditions under which this model outperforms, from a cost viewpoint, other two classical age-replacement models. The analysis reveals that inspection is advantageous if the system can function with the critical component in the defective state for a long enough time. The proportion of weak units and the quality of inspections also determine the optimum policy. The results about the range of application of the model are useful for decision making in actual maintenance. A case study concerning the timing belt of a four-stroke engine illustrates the model. info:eu-repo/grantAgreement/ES/MICINN/PID2021-123737NB-I00 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 6.7 2023 ENGINEERING, INDUSTRIAL 11 / 69 = 0.159 2023 Q1 T1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS 21 / 170 = 0.124 2023 Q1 T1 1.701 2023 Computer Science (miscellaneous) 2023 Q1 Engineering (miscellaneous) 2023 Q1 12.7 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Calvo, E. Universidad de Zaragoza (orcid)0000-0002-5631-1401 Badía, F.G. Universidad de Zaragoza (orcid)0000-0002-6651-3306 2007 265 Universidad de Zaragoza Dpto. Métodos Estadísticos Área Estadís. Investig. Opera. 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 181 (2023), 109291 [13 pp.] Comput. ind. eng. COMPUTERS & INDUSTRIAL ENGINEERING 0360-8352 918793 http://zaguan.unizar.es/record/126873/files/texto_completo.pdf Versión publicada 2744744 http://zaguan.unizar.es/record/126873/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:126873 articulos driver 2024-11-22-12:08:53 ARTICLE