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Building Functional Safety into Complex Software Systems, Part III

Authored on: May 16, 2013 by Chris Hobbs

Technical Paper

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Hasty attempts to deal with a specific safety issue without considering the question of overall system dependability may lead to the introduction of new problems. We use the example of an in-cab train controller for an Automated Train Operations (ATO) system to examine the effect on dependability of adding software error detection to a 2-out-of-2 system, consider the benefits and adverse consequences of this approach, and suggest other approaches to improving dependability.

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