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Availability optimization of systems subject to competing risk. (English) Zbl 1176.90150

Summary: This paper considers a competing risk (degradation and sudden failure) maintenance situation. A maintenance model and a repair cost model are presented. The degradation state of the units is continuously monitored. When either the degradation level reaches a predetermined threshold or a sudden failure occurs before the unit reaches the degradation threshold level, the unit is immediately repaired (renewed) and restored to operation. The subsequent repair times increase with the number of renewals. This process is repeated until a predetermined time is reached for preventive maintenance to be performed. The optimal maintenance schedule that maximizes the unit availability subject to repair cost constraint is determined in terms of the degradation threshold level and the time to perform preventive maintenance.

MSC:

90B25 Reliability, availability, maintenance, inspection in operations research
62K05 Optimal statistical designs

Software:

Matlab
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Full Text: DOI

References:

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