ZB '02 Proceedings of the 2nd International Conference of B and Z Users on Formal Specification and Development in Z and B
Introducing Dynamic Constraints in B
B '98 Proceedings of the Second International B Conference on Recent Advances in the Development and Use of the B Method
Model-Checking CSP-OZ Specifications with FDR
IFM '99 Proceedings of the 1st International Conference on Integrated Formal Methods
Composing specifications using communication
ZB'03 Proceedings of the 3rd international conference on Formal specification and development in Z and B
Combining CSP and b for specification and property verification
FM'05 Proceedings of the 2005 international conference on Formal Methods
Augmenting formal development with use case reasoning
Ada-Europe'12 Proceedings of the 17th Ada-Europe international conference on Reliable Software Technologies
Formal modelling and verification of service-oriented systems in probabilistic event-b
IFM'12 Proceedings of the 9th international conference on Integrated Formal Methods
Linking modelling in event-b with safety cases
SERENE'12 Proceedings of the 4th international conference on Software Engineering for Resilient Systems
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Model-oriented formalisms rely on a combination of safety constraints and satisfaction of refinement obligations to demonstrate model correctness. We argue that for a significant class of models a substantial part of the desired model behaviour would not be covered by such correctness conditions, meaning that a formal development potentially ends with a correct model inadequate for its purpose. In this paper we present a method for augmenting Event-B specifications with additional proof obligations expressed in a visual, diagrammatic way. A case study illustrates how the method may be used to strengthen a model by translating use case scenarios from requirement documents into formal statements over a modelled system.