Yes, KTern uses the test case repository of the system to analyse the test case and point out the necessary cases which has to be tested based on the impact which can be made, the platform classifies the test cases into :

1. Fit View

2. Gap View

The test cases which are analysed from the already existing test repository are added into the fit view, There might be some process steps or impacted cases for which the system might not have any test case. In that situation KTern creates a set of test cases and prompts the respective stakeholder of the impacted case to test, These test cases are identified as the Gap. To learn more check Out Test Case Impact analysis & KTern