L. Chen, J. May, and G. Hughes (UK)
Fault Tolerance, Redundant Systems
The evaluation of the gain in reliability of multi-version software is one of the key issues in the safety assessment of high integrity systems. Fault simulation has been proposed as a practical method to estimate diversity of multi-version software. This paper applies data-flow perturbation as an implementation of the fault injection technique to evaluate redundant systems under various conditions. A protection system is used as an example to illustrate the evaluation of software structural diversity, optimal selection of channel-pairs and the assessment of different designs. An analysis demonstrates the potential value of using uniformly simple software system components.
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