129319 20231215094308.0 doi 10.1109/TR.2019.2897048 sideral 112676 ART-2019-112676 eng Cavalcante, C.A.V. Imperfect Inspection of a System With Unrevealed Failure and an Unrevealed Defective State 2019 This paper proposes a model of inspection of a protection system in which the inspection outcome provides imperfect information of the state of the system. The system itself is required to operate on demand typically in emergency situations. The purpose of inspection is to determine the functional state of the system and consequently whether the system requires replacement. The system state is modeled using the delay time concept in which the failed state is preceded by a defective state. Imperfect inspection is quantified by a set of probabilities that relate the system state to the outcome of the inspection. The paper studies the effect of these probabilities on the efficacy of inspection. The analysis indicates that preventive replacement mitigates low-quality inspection and that inspection is cost-effective provided the imperfect inspection probabilities are not too large. Some derivative policies in which replacement is "postponed" following a positive inspection are also studied. An isolation valve in a utility network motivates the modeling. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MINECO/MTM2015-63978-P info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.177 2019 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE 12 / 53 = 0.226 2019 Q1 T1 COMPUTER SCIENCE, SOFTWARE ENGINEERING 17 / 107 = 0.159 2019 Q1 T1 ENGINEERING, ELECTRICAL & ELECTRONIC 81 / 265 = 0.306 2019 Q2 T1 1.099 2019 Safety, Risk, Reliability and Quality 2019 Q1 Electrical and Electronic Engineering 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Scarf, P.A. Berrade, M.D. Universidad de Zaragoza (orcid)0000-0002-8035-5762 2007 265 Universidad de Zaragoza Dpto. Métodos Estadísticos Área Estadís. Investig. Opera. 68, 2 (2019), 764-775 IEEE trans. reliab. IEEE TRANSACTIONS ON RELIABILITY 0018-9529 9096754 http://zaguan.unizar.es/record/129319/files/texto_completo.pdf Postprint 3327378 http://zaguan.unizar.es/record/129319/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:129319 articulos driver 2023-12-14-13:17:03 ARTICLE