Abstract
Availability is one of the crucial characteristics that measures the system quality and influences the users and system designers. The aim of this work is to provide an approach to improve the system availability by taking into account different system situations at design step using SysML state machine diagram. We construct a formal model of state machine in the probabilistic calculus which supports modeling of concurrency and uncertainty. In this paper, we consider a single industrial control equipment and a multiprocessing computing platform where its behavior is modeled by SysML state machine diagram and we use logical specification of maintainability and availability properties. The probabilistic model checker PRISM has been used to perform quantitative analyses of these properties.
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