Create and manage Execution Set in ProductTree.

Click Add.

Select "Execution Set"

Type name, such as "Safety Execution Set"

Click "Save"

Click "Add test to execution set".

Expand your test design document and locte the test cases you wish to run

Select some test cases

Click "Add". Tests will be added to the execution set

Close the "Add test to execution" right pane

You can also add tests using a filter. Clcik the "More actions" button

Click "Add test cases by filter"

Type search criteria

Select the test you want to add

Click the "Add" button to add test to the executions set.