SSR: Statechart with shared resources

In order to achieve an implementation correctly, it has been known that specification and its verification in early design stage is important, especially, during developing systems like safety critical systems or embedded real-time systems. Statechart is a widely used graphical formal specification language, however, it is not trivial to specify system with shared resources. In this paper, we introduce an extension of statechart, called statechart with shared resources (in short, SSR) and present process algebraic semantics of SSR. Having an abstraction of shared resources, designers can capture design requirement efficiently without any functional or implemental details of shared resources in the system. Since its semantics is based on a process algebra, SSR can be translated into a process algebra and its properties can be verified using process algebraic tools.