Advanced – Non-Functional Testing
Functional Suitability – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
The degree to which a product provides functions that meet stated and implied needs when used under specified conditions (ISO/IEC 25010).
In simple words
Does the software actually do what it should? Correctness, completeness, appropriateness.
Exam tip
One of the eight ISO 25010 product quality characteristics.
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