Distributed System Development in B

The B-Method is a method for the stepwise derivation of sequential programs. In this paper we show how the B-Method can be used for designing distributed systems by embedding action systems within this method. The action system formalism is designed for the construction of parallel and distributed systems in a stepwise manner within the refinement calculus. We describe how action systems are written in B AMN. We also show the correspondence between refinement rules for action systems and the proof obligations generated in the B-Method. Furthermore, we propose an extension of the B-Method to cover parallel and distributed systems. Familiarity with B AMN is assumed.