Regression testing retests previously working business behavior after a configuration change, development, defect fix, integration change, upgrade or release. Teams first assess which processes, interfaces, roles and data could be affected, then select reusable scenarios that cover the highest-risk existing behavior. The result is compared with defined expected outcomes so new defects can be separated from intentional change.
Regression starts with change impact
The test team needs to understand what changed before choosing what to rerun. A change to pricing, posting logic, workflow, authorization, master data behavior or an integration can affect more than the screen or object where the change was made. Impact analysis identifies the connected business journeys that could plausibly regress.
It is usually risk-based, not “rerun everything”
A useful regression pack concentrates on critical, frequently used or highly integrated scenarios, along with controls whose failure would have significant financial or operational consequences. Stable low-risk behavior may require less coverage, while a change near an important integration or posting boundary deserves more.
Reusable tests need stable expected results
SAP Cloud ALM supports manual and automated test cases, test plans and test execution with expected results and pass/fail outcomes. A regression suite becomes valuable when its scenarios are maintainable, use representative data, and state expected outcomes clearly enough that different testers can recognize the same failure.
Failed regression means investigate the difference
A changed result is not automatically a defect. First determine whether the behavior changed intentionally as part of the approved requirement. If not, capture evidence and create a defect with enough context to reproduce the problem. If the new behavior is intentional, the reusable test case and its expected result may need controlled maintenance.
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