کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
482254 | 1446211 | 2006 | 17 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Replacement times and costs in a degrading system with several types of failure: The case of phase-type holding times Replacement times and costs in a degrading system with several types of failure: The case of phase-type holding times](/preview/png/482254.png)
A reliability system submitted to external and internal failures, that can be repairable or non-repairable, with degradation levels, and with sojourn times phase-type distributed, is considered. Repair is not as good as new, and the repair of internal failure follows policy N, that is, after N completed repairs the system is replaced by a new one to the following failure, repairable or not. For this system, a Markov model is constructed, and the stationary probability vector is calculated. It is shown that the distribution of the time between two consecutive replacements follows a phase-type distribution, whose representation is determined. The costs of these periods are calculated. An optimization problem involving the costs, the availability, and the number of internal repairs is illustrated by a numerical example.
Journal: European Journal of Operational Research - Volume 175, Issue 2, 1 December 2006, Pages 1193–1209