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Dependability Evaluation Techniques

Chapter

Abstract

Along with cost and performance, dependability is the third critical criterion upon which system-related decisions are made. Dependability evaluation is important, because it helps identifying aspects of the system which are critical for its dependability. Such aspects can be, for example, component reliability, fault coverage, or maintenance strategy. Once the critical points are identified, design engineers can focus on their improvements early in the product development stage. In this chapter, we introduce common dependability measures, such as failure rate, mean time to failure, mean time to repair, mean time between failures, and fault coverage. We consider combinatorial dependability models such as reliability block diagrams, fault trees, and reliability graphs. We also study stochastic dependability models such as Markov chains, which make possible the analysis of more complex scenarios. Finally, we show how these models can be used for evaluating system reliability, availability, and safety.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.KTH Royal Institute of TechnologyKristaSweden

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