Research Article
Generalized Accelerated Failure Time Frailty Model for Systems Subject to Imperfect Preventive Maintenance
Table 2
Average local lifetime in each section.
| Section | Number of failed signals | Average local lifetime |
| Before 1st PM | 33 | 96.5 | Between 1st and 2nd PM | 49 | 85.3 | Between 2nd and 3rd PM | 80 | 72.9 |
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