System-Level Reliability and Sensitivity Analyses for Three Fault-Tolerant System Architectures
نویسندگان
چکیده
This paper discusses the modeling and analysis of three major fault-tolerant software system architec-tures: DRB (Distributed Recovery Blocks), NVP (N-Version Programming) and NSCP (N Self-Checking Programming). In the system-level reliability modeling domain, fault tree analysis techniques and Markov reward modeling techniques are combined to incorporate transient and permanent hardware faults as well as independent and related software faults. These models are parameterized by a real-world fault-tolerant ight control computer application for evaluations and comparisons. In particular, a series of sensitivity analysis is performed to explore the critical components in each fault-tolerant architecture and display their quantitative impacts to the overall system reliability.
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