After you create your test plan, you can associate the appropriate 4Test scripts and test cases that implement your test plan. You create this association by inserting script and testcase statements in the appropriate locations in the test plan.
You can insert a script and testcase statement for each test description, although placing a statement at the group level when possible eliminates redundancy in the test plan. For example, since it is usually good practice to place all the test cases for a given application feature into a single script file, you can reduce the redundancy in the test plan by specifying the script statement at the group level that describes that feature.
You can also insert a testcase statement at the group level, although doing so is only appropriate when the test case is data driven, meaning that it receives test data from the plan. Otherwise the same test case would be called several times with no difference in outcome.