The average time required to troubleshoot, fix, and restore a failed software system back into operational status is:
AMean Time To Repair (MTTR)
BMean Time To Failure (MTTF)
CMean Time Between Failures (MTBF)
DSystem Availability Index
Explanation
MTTR measures maintenance efficiency and downtime recovery speed.
Exam Relevance
- Topic: Software Quality Metrics
- Subtopic: Reliability Metrics

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