| Article ID: | iaor19911238 |
| Country: | Japan |
| Volume: | J73-D-I |
| Issue: | 2 |
| Start Page Number: | 189 |
| End Page Number: | 195 |
| Publication Date: | Feb 1990 |
| Journal: | Transactions of the Institute of Electronics, Information and Communication Engineers |
| Authors: | Matsumoto Ken-ichi, Kikuno Tohru, Torii Koji. |
Recently, two types of S-shaped software reliability growth models (a delayed S-shaped SRGM and an inflection S-shaped SRGM) have been proposed, and some analytical studies have been reported for these S-shaped SRGM’s. There are, however, only a few studies comparing these S-shaped SRGM’s using data from a relatively small project. This paper discusses an experimental evaluation of S-shaped SRGM’s using the common data sets collected from university student projects. It is shown that the delayed S-shaped model is superior to the inflection S-shaped model in both the accuracy of estimation and the goodness of fit. In addition, a new estimation method is proposed for an inflection rate, that is one of the key parameters in the inflection S-shaped SRGM. This new estimation method improves both the accuracy of estimation and the goodness of fit of the inflection S-shaped model. [In Japanese.]