Which document is essential for linking requirements to test cases?

The Traceability Matrix is crucial for linking requirements to test cases because it provides a structured way to track the relationships between the requirements and the respective test cases designed to verify them. This matrix typically lists all requirements on one side and connects them with relevant test cases on the other, allowing for clear visibility of which tests verify which requirements. This ensures that all requirements are adequately tested and helps in identifying any gaps in testing.

This tool aids in confirming that the final product aligns with the specified requirements, thereby playing a critical role in quality assurance. Having a Traceability Matrix also facilitates easier updates and maintenance throughout the project lifecycle, as it provides a clear reference for understanding the impacts of changes made to requirements, ensuring that all corresponding test cases are adjusted as necessary for comprehensive coverage.