EM Algorithms for Logistic Software Reliability Models

H. Okamura, T. Dohi, and S. Osaki (Japan)


Software Reliability Model, Logistic Distribution, Non Homogeneous Poisson Processes, EM Algorithms


This paper treats two logistic software reliability models called the inflection S-shaped model and the log-logistic model, and develops an efficient iterative scheme to calcu late the maximum likelihood estimates of the model pa rameters, via the EM (expectation-maximization) princi ple. Numerical examples are devoted to illustrate the ef fectiveness of the estimation algorithms proposed in this paper.

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