Requirements traceability defines a relationship between two or more requirements. When performing impact analysis, the traceability links shows all stakeholders how other requirements are affected.
Select the "Requirements" against which the users need to add the dependent requirements. Press "ctrl+D" or go to requirement details.
Click "Add Requirement Traceability" button and requirement Tree opens. Users can select and add those as the dependent requirement.
Select "Impact Analysis" tab and all the relevant requirements would be shown which will help us to test the impacted areas.