OSS Reliability Measurement and Assessment by Shigeru Yamada & Yoshinobu Tamura

Author:Shigeru Yamada & Yoshinobu Tamura
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(9.22)

Also, the mean time between software failures is useful to measure the property of the frequency of software failure-occurrence. Then, the cumulative MTBF(denoted by ) is approximately given by:

(9.23)

9.5 Comparison of Goodness-of-Fit

The software managers can compare the goodness-of-fit of the proposed stochastic differential equation models (SDE models) in case of and , with the conventional exponential SDE model [8], and the conventional S-shaped SDE model [8]. The developed tool is adopted the value of the Akaike’s information criterion (AIC) as one of comparison criteria of goodness-of-fit. AIC helps software managers to select the optimal model among ones estimated by the method of maximum-likelihood. It is given by

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