| Article ID: | iaor20102919 |
| Volume: | 37 |
| Issue: | 1 |
| Start Page Number: | 56 |
| End Page Number: | 60 |
| Publication Date: | Jan 2009 |
| Journal: | Operations Research Letters |
| Authors: | Li Xiaohu, Yan Rongfang, Zuo Ming J |
| Keywords: | renewal processes |
This paper investigates the heterogeneity of components with proportional hazard rates in a redundant system. The total number of those standbys surviving the failure time of some active component is derived, and the algorithm to determine the optimal number of standbys is also discussed.