Functional Coverage measures the extent of testing that validates system functionality. It ensures all features are tested according to specifications.
Key Aspects:
1. Completeness of test cases
2. Alignment with requirements
3. Feature validation
4. Test scenario diversity
5. Identification of untested areas
Improving Functional Coverage:
1. Creating comprehensive test plans
2. Mapping tests to requirements
3. Using various testing techniques
4. Tracking tested and untested features
5. Continuously updating test cases
High functional coverage increases confidence in software quality and reliability.