Difference between Regression Testing and Retesting

In software testing, regression testing and retesting are both important processes, but they serve different purposes:

Regression Testing:

Regression testing is performed to ensure that a recent code change has not adversely affected existing features of the software. It involves re-executing test cases that cover the areas of the code that have been modified, as well as related features that could potentially be impacted. Regression testing is typically automated to efficiently check for any regressions in the software.

Retesting:

Retesting is focused on verifying that a specific issue or defect identified in a previous testing phase has been fixed correctly. Test cases related to the resolved issue are executed to confirm that the bug has been successfully rectified. Retesting is typically a manual process to validate the bug fix and ensure that the software behaves as expected after the correction.

In summary, regression testing is broad and aims to validate the overall functionality of the software after changes, while retesting is specific and validates the resolution of individual defects.