Reliability modeling incorporating error processes for Internet-distributed software
Jung-Hua Lo, Sy‐Yen Kuo, Chin‐Yu Huang · 2002
The paper proposes several improvements to conventional software reliability growth models (SRGMs) to describe actual software development processes by eliminating an unrealistic assumption that detected errors are immediately corrected. A key part of the proposed models is the "delay-effect factor", which measures the expected time lag in correcting the detected faults during software development. To establish the proposed model, we first determine the delay-effect factor to be included In the actual correction process. For the conventional SRGMs, the delay-effect factor is basically non-decreasing. This means that the delayed effect becomes more significant as time moves forward. Since this phenomenon may not be reasonable for some applications, we adopt a bell-shaped curve to reflect the human learning process in our proposed model. Experiments on a real data set for Internet-distributed software has been performed, and the results show that the proposed new model gives better performance in estimating the number of initial faults than previous approaches.