Software System Availability is mathematically defined using MTBF and MTTR as:
A$ ext{Availability} = rac{ ext{MTTR}}{ ext{MTBF}}$
B$ ext{Availability} = rac{ ext{MTBF}}{ ext{MTBF} + ext{MTTR}}$
C$ ext{Availability} = ext{MTBF} - ext{MTTR}$
D$ ext{Availability} = rac{ ext{MTTF}}{ ext{MTTR}}$
Explanation
Availability measures operational readiness as the ratio of operational uptime to total time ($ rac{MTBF}{MTBF + MTTR}$).
Exam Relevance
- Topic: Software Quality Metrics
- Subtopic: Reliability Metrics
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