Modechart: A Specification Language for Real-Time Systems
IEEE Transactions on Software Engineering
Patterns for generating a layered architecture
Pattern languages of program design
Completeness and Consistency in Hierarchical State-Based Requirements
IEEE Transactions on Software Engineering - Special issue: best papers of the 17th International Conference on Software Engineering (ICSE-17)
Mode-Automata: About Modes and States for Reactive Systems
ESOP '98 Proceedings of the 7th European Symposium on Programming: Programming Languages and Systems
An Introduction to Requirements Capture Using PVS: Specification of a Simple Autopilot
An Introduction to Requirements Capture Using PVS: Specification of a Simple Autopilot
Fault Tolerance in a Layered Architecture: A General Specification Pattern in B
SEFM '04 Proceedings of the Software Engineering and Formal Methods, Second International Conference
Modes in component behavior specification via EBP and their application in product lines
Information and Software Technology
Modal Systems: Specification, Refinement and Realisation
ICFEM '09 Proceedings of the 11th International Conference on Formal Engineering Methods: Formal Methods and Software Engineering
Modes for software architectures
EWSA'06 Proceedings of the Third European conference on Software Architecture
Supporting reuse in event b development: modularisation approach
ABZ'10 Proceedings of the Second international conference on Abstract State Machines, Alloy, B and Z
On fault tolerance reuse during refinement
Proceedings of the 2nd International Workshop on Software Engineering for Resilient Systems
| Hi-index | 0.00 |
One of the guarantees that the designers of on-board satellite systems need to provide, so as to ensure their dependability, is that the mode transition scheme is implemented correctly, i.e. that the states of system components are consistent with the global system mode. There is still, however, a lack of scalable approaches to developing and verifying systems with complex mode transitions. This paper presents an approach to the formal development of mode-rich systems by refinement in Event-B. We formalise the concepts of modes and mode transitions as well as deriving specification and refinement patterns which support correct-by-construction system development. The proposed approach is validated by a formal development of the Attitude and Orbit Control System (AOCS) undertaken within the ICT DEPLOY project. The experience gained in the course of developing such a complex industrial system as AOCS, shows that Event-B refinement provides the engineers with a scalable formal technique. Moreover, the case study has demonstrated that Event-B can facilitate formal development of mode-rich systems and, in particular, proof-based verification of their mode consistency.