Test Execution data is created by moving Test Scripts into the Test Execution folder, Tests are run from the Test Execution folder.
Test Execution can also be created by dragging a single Requirement and dropping it onto an Execution Package.
All Test Cases associated with that Requirement now have Test Executions visible under the Execution Package
Test Execution data can be grouped as required, for example by release, iteration or system and can be re-run as required.
Changes made to a Test Script will automatically update the related Test Execution information unless the Test is in the middle of being executed.