The TestDirector is completely management tool. So the fields in STLC which are not covered in functional tool like WR (Test Planning,TestDevelopment etc), the remaining are covered here in respect to automate the total testing process.

So once put the requirements in TD then for future reference or verifying the testcases or modification etc.

In TestDirector(Requirement Tab) We Stores Our Project Requirement documents according to our modules or functionality of the applications. This helps us to makes sures that all requirements are covered when we trace developed Test Case/Test Script to the requirements.

This helps QA Manager to review what extent the requirements are covered.