doi:10.1109/TR.2015.2417431engBerrade, M. D.Scarf, P. A.Cavalcante, C. A. V.Some insights into the effect of maintenance quality for a protection systemART-2015-90813This paper considers an inspection and preventive replacement policy for a one-component protection or cold standby system. Inspection is imperfect, and subject to false positives and negatives; preventive replacement may also be of poor quality. We determine conditions relating to the quality of the inspection and preventive replacement under which a maintained system would not benefit from the execution of inspections and preventive maintenance. We present examples with decreasing failure rate component lifetimes in which preventive replacement is cost-optimal, contrary to the classic policy. Such cases arise when inspections do not necessarily detect the failed state.2015http://zaguan.unizar.es/record/12949810.1109/TR.2015.2417431http://zaguan.unizar.es/record/129498oai:zaguan.unizar.es:129498IEEE TRANSACTIONS ON RELIABILITY 64, 2 (2015), 661-672byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess