Software reliability and operations · Reliability metrics
Service availability from downtime
Calculate time-based availability from an observation period and measured downtime.
Method and scope
Availability = (total observation time − downtime) ÷ total observation time × 100%.
Calculate a historical time-based availability percentage for a stated observation window. Intended for Learners, Operations teams.
Inputs- Total observation time — 1
- Measured downtime — 1
SOURCE AND LIMITS
Assumptions: Observation and downtime values use the same time unit and measurement window. Downtime is measured using the user’s stated service availability definition.
Limitations: A time-based metric may differ from request-based availability.
Method version 1.0.0 · Unit registry and result provenance are shown after calculation. This tool is limited to the documented scope.Explore related fields
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