Requirement Traceability Matrix and Test coverage matrices will help us to determine that our test cases have good coverage.
Requirement traceability matrix will help us to determine that the test conditions are enough so that all the requirements are covered. Coverage matrices will help us to determine that the test cases are enough to satisfy all the identified test conditions in RTM.
An RTM will look something like:
RTM
Similarly, Test coverage matrices will look like:
Test coverage matrices