Validation of Formal Models by Refinement Animation
[PDF] [Bibtex]Science of Computer Programming, 78(3): 272-292, 2013.
We provide a detailed description of refinement in Event-B, both as a contribution in itself and as a foundation for the approach to simultaneous animation of multiple levels of refinement that we propose. We present an algorithm for simultaneous multi-level animation of refinement, and show how it can be used to detect a variety of errors that occur frequently when using refinement. The algorithm has been implemented in ProB and we applied it to several case studies, showing that multi-level animation is tractable also on larger models. We present empirical results and discuss how the algorithm can be combined with symmetry reduction.
In Managing Requirements Knowledge, Springer, 2013.
This chapter presents the the Requirements Modeling Framework (RMF), an Eclipse-based open source platform for requirements engineering. The core of RMF is based on the emerging Requirements Interchange Format (ReqIF), which is an OMG standard. The project uses ReqIF as the central data model. At the time of this writing, RMF was the only open source implementation of the ReqIF data model.
By being based on an open standard that is currently gaining industry support, RMF can act as an interface to existing requirements management tools. Further, by based on the Eclipse platform, integration with existing Eclipse-based offerings is possible.
In this chapter, we will describe the architecture of the RMF project, as well as the underlying ReqIF standard. Further, we give an overview of the GUI, which is called ProR. A key strength of RMF and ProR is the extensibility, and we present the integration ProR with Rodin, which allows traceability between natural language requirements and Event-B formal models.
A Method and Tool for Tracing Requirements into Specifications
[PDF] [Bibtex]Submitted to Science of Computer Programming
The creation of a consistent system description is a challenging problem of requirements engineering. Formal and informal reasoning can greatly contribute to meet this challenge. However, this demands that formal and informal reasoning and the system description are connected in such way that the reasoning permits drawing conclusions about the system description.
We describe an incremental approach to requirements modelling and validation that incorporates formal and informal reasoning. Our main contribution is an approach to requirements tracing that delivers the necessary connection that links the reasoning to the system description. Formal refinement is used in order to deal with large and complex system descriptions.
We discuss tool support for our approach of requirements tracing that combines informal requirements modelling with formal modelling and verification while tracing requirements among each other and into the formal model.
