Advanced – Non-Functional Testing
Functional Completeness – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
The degree to which the set of functions covers all the specified tasks and user objectives.
In simple words
Does the software cover every promised feature and user goal?
Exam tip
Missing features = incomplete, even if what's there works perfectly.
Related terms
- Functional SuitabilityDoes the software actually do what it should? Correctness, completeness, appropriateness.
- Test BasisThe source of truth you derive tests from — requirements, user stories, models, code, or standards.
- ISO/IEC 25010The reference model with 8 product quality characteristics and 5 quality-in-use characteristics.
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