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Structuring Specifications with Modes

Lookup NU author(s): Dr Alexei Iliasov, Dr Fernando Dotti, Professor Alexander RomanovskyORCiD



The two dependability means considered in this paper are rigorous design and fault tolerance. It can be complex to rigorously design some classes of systems, including fault tolerant ones, therefore appropriate abstractions are needed to better support system modelling and analysis. The abstraction proposed in this paper for this purpose is the notion of operation mode. Modes are formalised and their relation to a state-based formalism in a refinement approach is established. The use of modes for fault tolerant systems is then discussed and a case study presented. Using modes in state-based modelling allows us to improve system structuring, the elicitation of system assumptions and expected functionality, as well as requirement traceability.

Publication metadata

Author(s): Iliasov A, Dotti FL, Romanovsky A

Publication type: Report

Publication status: Published

Series Title: School of Computing Science Technical Report Series

Year: 2009

Pages: 11

Print publication date: 01/03/2009

Source Publication Date: March 2009

Report Number: 1143

Institution: School of Computing Science, University of Newcastle upon Tyne

Place Published: Newcastle upon Tyne