Advanced – Non-Functional Testing
Fail Safe – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A design principle where systems degrade to a safe state on failure, protecting users and data.
In simple words
If something fails, default to a safe outcome.
Exam tip
Fail-safe is common in safety-critical systems (medical, avionics, automotive).
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