Safety critical systems are becoming more complex, both in the type of functionality they provide and in the way they are demanded to interact with their environment. Such growing complexity requires an adequate increase in the capability of safety engineers to assess system safety, including analyzing the bahaviour of a system in degraded situations. Formal verification techniques, like symbolic model checking, have the potential of dealing with such a complexity and are more often being used during system design. In this paper we present the FSAP/NuSMV-SA platform, based on the NuSMV2 model checker, that implements known and novel techniques to help safety engineers perform safety analysis. The main functionality of FSAP/NuSMV-SA include: failure mode definition based on a library of failure modes, fault injection, automatic fault tree construction for monotonic and non-monotonic systems, failure ordering analysis. The goal is to provide an environment that can be used both by design engineers to formally verify a system and by safety engineers to automate certain phases of safety assessment. The platform is being developed within the ESACS project (Enhanced Safety Analysis for Complex Systems), an European-Union-sponsored project in the avionics sector, whose goal is to define a methodology to improve the safety analysis practice for complex systems development
Improving System Reliability via Mdel Checking: the FSAP/NuSMV-SA Safety Analysis Platform
Bozzano, Marco;Villafiorita Monteleone, Adolfo
2003-01-01
Abstract
Safety critical systems are becoming more complex, both in the type of functionality they provide and in the way they are demanded to interact with their environment. Such growing complexity requires an adequate increase in the capability of safety engineers to assess system safety, including analyzing the bahaviour of a system in degraded situations. Formal verification techniques, like symbolic model checking, have the potential of dealing with such a complexity and are more often being used during system design. In this paper we present the FSAP/NuSMV-SA platform, based on the NuSMV2 model checker, that implements known and novel techniques to help safety engineers perform safety analysis. The main functionality of FSAP/NuSMV-SA include: failure mode definition based on a library of failure modes, fault injection, automatic fault tree construction for monotonic and non-monotonic systems, failure ordering analysis. The goal is to provide an environment that can be used both by design engineers to formally verify a system and by safety engineers to automate certain phases of safety assessment. The platform is being developed within the ESACS project (Enhanced Safety Analysis for Complex Systems), an European-Union-sponsored project in the avionics sector, whose goal is to define a methodology to improve the safety analysis practice for complex systems developmentI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
