MTBF & MTTR
Mean Time Between Failures (MTBF) and Mean Time To Repair (MTTR) - two most-cited reliability metrics.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Total operating hours | h | |
| Total repair time | h | |
| Number of failures |
Source: IEEE 493 - Reliability in Industrial Power Systems
In short
Mean Time Between Failures (MTBF) and Mean Time To Repair (MTTR) - two most-cited reliability metrics.