Date Added: Jul 2009
Regression testing is an important and also a very expensive activity in the software life cycle. To reduce the cost of regression testing, test cases are prioritized. One goal of test case prioritization technique is to increase a test suite's rate of fault detection and to reduce the cost of regression testing. G. Rothermel has provided a metric, Average Percentage of Fault Detected (APFD), for measuring rate of fault detection during prioritization. This metric assumes that all test cases and fault costs are uniform. In practice, test case and fault costs may vary, and in such cases the previous APFD metric can be unsatisfactory.