Research Article
Developing an Inspection Optimization Model Based on the Delay-Time Concept
Table 2
Results summary for numerical examples.
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ROCOD function from | Periodic schedule | Optimized aperiodic schedule | Total downtime ratio (%) | Downtime during lifetime (month) | Total downtime ratio (%) | Improvement in downtime ratio (%) | Reduction in downtime (month) |
| Linear | 7.99 | 19.6 | 7.61 | 0.38 | 0.92 | Quadratic | 13.91 | 34.4 | 12.04 | 1.87 | 4.6 |
Expon’l | 20.66 | 51.6 | 16.53 | 4.13 | 10.1 |
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