Combining Formal Methods and Safety Analysis - The ForMoSA Approach

In the ForMoSA project [17] an integrated approach for safety analysis of critical, embedded systems has been developed. The approach brings together the best of engineering practice, formal methods and mathematics: traditional safety analysis, temporal logics and verification, and statistics and optimization. These three orthogonal techniques cover three different aspects of safety: fault tolerance, functional correctness and quantitative analysis. The ForMoSA approach combines these techniques to answer these safety relevant question in a structured and formal way. Furthermore, the tight combination of methods from different analysis domains yields results which can not be produced by any single technique. The methodology was applied in case studies to different industrial domains. One of them is the height control of the Elbtunnel in Hamburg [16] from the domain of electronic traffic control, which we present as an illustrating example.