More experience with data flow testing

Experience is provided about the cost and effectiveness of the Rapps-Weyuker data flow testing criteria. This experience is based on studies using a suite of well-known numerical programs, and supplements an earlier study (Weyuker 1990) using different types of programs. The conclusions drawn in the earlier study involving cost are confirmed in this study. New observations about tester variability and cost assessment, as well as fault detection, are also provided.<>