Communication in safety cases-a semantic approach

Jane Hesketh, Dave Robertson

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In safety critical domains, meta-level requirements such as guidelines and regulations influence design. As well as stating properties which must hold of the final system, they shape the process of design from its inception through to its specification and implementation. By formalising these meta-level requirements, they can be made available for guiding and constraining the development of a design. In this way, building a safety case demonstrating that the derived specification satisfies the regulations can become an integral part of design. Subsequent design revisions are constrained to the framework of regulation. Similarly, the implications of revisions to meta-level requirements become assessable. We are formalising a range of documents relating to Shell Expro's emergency shutdown systems. They include both meta-level requirements, in the form of a code of practice, and design documents ranging from high level outline to low level functionality. By representing each level of information, and making its semantics explicit, it becomes possible to generate significant sections of the lower levels, using control from meta-level requirements
Original languageEnglish
Title of host publicationKnowledge-Based Systems for Safety Critical Applications, IEE Colloquium on
Number of pages3
Publication statusPublished - 1994
Externally publishedYes


Dive into the research topics of 'Communication in safety cases-a semantic approach'. Together they form a unique fingerprint.

Cite this