Functional diversity design of safety-related systems

Abstract

Traditionally, the application of safety voted-groups architectures is a matter of redundancy, where hardware and software components are replicated and become a source of vulnerabilities with decreased system reliability as a whole, therefore necessity of functional diversity design is become essential. Well known diversity approach for similar erroneous results mitigation is wide-ly used, but combined software and hardware techniques to achieve necessary safety system requirements without enlarged implementation of price isn't yet evolved. Avoidance of redundant complexity with limitation the number of channel's internal states could lead to common cause failures reduction and suf-ficient level of residual risks.