Assessing reliability risk using fault correction profiles
HASE'04 Proceedings of the Eighth IEEE international conference on High assurance systems engineering
Investigating dynamic reliability and availability through state-space models
Computers & Mathematics with Applications
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This paper reviews existing Non-Homogeneous Poisson Process (NHPP) software reliability models and their limitations, and proposes a more powerful non-homogeneous Markov model for the fault detection/removal problem. In addition, this non-homogeneous Markov model allows for the possibility of a finite time to repair a fault and for imperfections in the repair process. The proposed scheme provides the basis for decision making both during the testing and the operational phase of the software product. Software behavior in the operational phase and the development test phase are related and the release time formulae are derived. Illustrations of the proposed model are provided.