Regression testing is used to uncover regression bugs which occur when software functionality stops working or fails to work in its planned format. Typically regression bugs occur due to the unintended consequences of program changes.

Regression testing is useful in the following cases:

• Time constraints for QA cycles
• Large number of test cases, test scenarios where client has to ensure effective QA for critical business processes
• Large number of changes due to enhancements or bug fixes
• Manual testing requires a large number of testing resources and time

Regression testing can be performed at three levels; business process levels, profile levels and/or interface levels. The key to success in automation testing is the clear definition of goals so that it is possible to identify what needs to be automated. Based on the complexity of the test case functional experts might be used in order to verify or test typical business processes.

Correct SAP testing is beneficial as many projects fail to test their SAP implementation correctly. They therefore suffer staggering financial loses and substantial fixing costs. SAP testing can minimize these costs, leaving the project in a better financial state. Regression testing can also track the quality of its output which leads to a higher quality of overall output.