A Traceability Matrix is an excellent tool to trace the requirements through an automation project. This is only possible when the User Requirements Specification (URS) contains traceable requirements with Smart criteria. Requirements can be made traceable by putting the requirements in the URS in a set of tables, where the requirements are numbered. Beside this is done for a Traceability Matrix, this is also required for a detailed Risk Assessment.
With the Traceability Matrix you are able to check the completeness of requirements in the documentation, implementation and tests. After the project the Traceability Matrix is used as a cross reference. This helps to define the required modifications to software and documents in case of necessary changes.