The Test Execution tool can be found in the Lead's Desktop, Tester's Desktop and any other role's Desktop that has been given access to this tool. This tool is used to execute testcases and update status. Test Cycles, Phases and Assignments in the Test Planning tool must be done before test execution can commence.
Once Test Planning is set up and assignments are made, the local tree of the Test Execution tool shows the appropriate test cycle and the phases/systems/sub-systems and their testcases.
For a tester in the Test Execution module, they will two local tree views. One view is labled My Executions and the other is All Executions.