Availability analysis for synchronous data-flow graphs in mixed-criticality systems

Abstract

The safety-critical industry is compelled to continually increase the number of functionalities in embedded systems. These platforms tend to integrate software with various non-functional requirements, in particular different levels of criticality. As a consequence, Mixed-Criticality Systems emerged in order to assure robustness, safety and predictability for these embedded platforms. Although Mixed-Critcality Systems show promising results, formal methods to quantify availability are still missing for this type of systems and will most likely be required for deployment. This paper presents a transformation process that first produces a formal model of a Mixed-Criticality System. From this formal model, it generates a PRISM automaton in order to compute availability.