On the edge. Regression testability

A systematic approach to the regression testing aspect of software maintainability is presented. It is stated that regression testing is important at the unit, integration, and system testing levels. Software development teams usually have responsibility for unit and integration testing, but do not consistently apply regression testing at these levels when they make changes and often do not even systematically retain test data. System or functional testers, on the other hand, are systematic about keeping test data and applying regression testing. This costs more than detecting regression error earlier. Results from a research project to evaluate regression testing concepts are discussed.<>