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Test environment availability
Track how often test environments are usable and what the downtime costs the team.
Quality & testingHow it's worked out
- Availability = (scheduled − unavailable) ÷ scheduled. Lost share = blocked hours ÷ (testers × 160)
- 160 working hours per tester a month
NoteAim for 95% or better during working hours. Blocked tester hours are the cost that justifies environment automation.
Source: ISTQB test management practice; test environment management (TEM) practice
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