@Dharmendra Gaur

you are absolutely right......

Traceability Matrix is used in bothe the SDLC and Testing  QA.

please refer this link for Traceability.

http://www.jiludwig.com/Traceability_Matrix_Structure.html

Traceability matrix is used to map between requirements and test cases
it is used to check all requirements are covered or not?

Tracabilty  Matrix is a document which is used to Map the UseCase  and testcases.i.e.it shows the full usecase on one side and names the respective testCases in which the flows of that usecase are covered.

Traceability Matrix is used for both SDLC(Software Development Life Cycle) as well as Test Life Cycle. In Test Life Cycle it is used to check in test cases whether Product meets software

Requirement or not....