What is a trace matrix and how is it formed?

Traceability matrix is a table that links requirements (software requirements, specifications) with test cases, ensuring coverage of all requirements by tests.

It is formed as follows:

1. Requirements or functional elements are listed in the rows of the matrix.
2. Test scenarios or test cases are listed in the columns.
3. Cells indicate which tests cover which requirements (for example, with a checkmark or link).

This helps to:

• Verify that all requirements are covered by tests.
• Track which tests need to be run when requirements change.
• Ensure transparency and completeness of testing.

Example:

Requirement	Test 1	Test 2	Test 3
Req 1	✓		✓
Req 2		✓
Req 3	✓	✓