Linking modelling in event-B with safety cases

Abstract

Safety cases are adopted in the certification process of many safety-critical systems. They justify why a system is safe and whether the design adequately incorporates safety requirements defined in a system requirement specification. The use of formal methods facilitates modelling and verification of safety-critical systems. In our work, we aim at establishing a link between formal modelling in Event-B and constructing a safety case. We propose an approach to incorporating safety requirements in a formal specification in such a way that it allows the developers to derive a safety case sufficient to demonstrate safety. We present a small case study illustrating the proposed approach. © 2012 Springer-Verlag.