How can you perform regression testing and retesting to ensure products or services are defect-free?

Regression testing is significant before any release in SDLC. As mentioned, whenever there is a code change ( new feature introduced or updated the existing feature) , regression testing is mandatory to ensure bug free application. - No need to develop new test cases but can use existing test cases that confirms the 100% functionality flow. - Test case updation is required for code change. - Prioritise the test cases based on the scope of the release. - Always not to expect a bug as a result, the aim is to test that there is no breakage in the functionality flow.

Regression testing is a type of software testing that ensures existing functionalities continue to work correctly after changes, such as bug fixes or new feature implementations. It involves re-running previously executed test cases to verify that no new defects have been introduced.

Restesting is ensures that the defect or bugs are resolved. - No testcases required at all time. - Follow the steps to reproduce. - Not mandatory to test entire flow of the module, testing the particular bug is enough.

Retesting involves checking specific test cases after a developer fixes reported bugs to confirm that the issues have been resolved and the functionality meets expectations. This process is crucial for ensuring the quality of the product or service and validating that no new defects have been introduced.

Point-wise approach to performing regression testing: 1) Select Test Cases: Identify critical test cases that cover key functionalities and areas impacted by changes. 2) Create Test Suite: Compile these test cases into an organized regression test suite. 3) Prepare Environment: Set up a testing environment that replicates the production setup. 4) Run Tests: Execute the regression test suite manually or with automation tools. 5) Log Results: Document outcomes and note any failures for analysis. 6) Report Findings: Share results with the development team, highlighting issues to be addressed. 7) Update Suite: Revise the test suite as needed and repeat testing for future changes.

To perform retesting, first identify the specific test cases related to the defects that have been fixed, and then execute those test cases to verify that the reported issues are resolved. Document the results to ensure that the functionality works as expected after the changes.

Benefits of Regression Testing: > Confirms that existing functionalities continue to work correctly after code changes, preventing new defects from being introduced. > Supports agile practices by allowing for frequent code updates without compromising system integrity. Benefits of Retesting: > Confirms that specific defects have been successfully resolved, ensuring that the functionality is now working as intended. > Ensures that reported issues are addressed, enhancing user experience and trust in the product. > Allows for targeted testing of specific areas affected by bugs, ensuring that solutions are effective before the product release.

Regression Testing is to find any new defect / bug created after code change if any. This ensures the software quality before presenting a phase of application to customer. Retesting is to test the known bug/ defect which are already detected, ensuring all known issues fixed.

To ensure the achievement of high-quality project outcomes, it is imperative for QA teams to embrace a systematic approach that involves conducting retests and regression tests as a sequential series of events for each build or release. The list of changes specified in release documentation or build delivery communications should serve as key reference points for devising strategies for retests and regression tests. While the QA team's primary focus should be on executing specific tests to validate the success of retests, it is equally crucial to identify a detailed view of the changes within the functional areas, for efficiently planning comprehensive or partial regression test activities throughout the release cycle.