This chapter presents the results of the validation and verification of a crucial component of BOS, a large safety-critical system that decides when to close and open the Maeslantkering, a storm surge barrier near the city of Rotterdam in the Netherlands. BOS was specified in the formal language Z and model checking has been applied to some of its subsystems during its development. A lightweigh...

This paper investigates specification, verification and test generation for synchronous and asynchronous circuits. The approach is called DILL (Digital Logic in LOTOS). DILL models are discussed for synchronous and asynchronous circuits. Relations for (strong) conformance are defined for verifying a design specification against a high-level specification. An algorithm is also outlined for gener...

Design patterns describe simple and elegant solutions to specific problems in software design. Usually designers have to perform ad hoc transformations in order to introduce them. Most of the time they do not want to introduce or change between patterns that result in a design with conflicting semantics. This is difficult to guarantee by performing ad-hoc transformations. In this paper, we use ...