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Towards a Clearer Understanding of Context and Its Role in Assurance Argument Confidence

Fulltext:


Authors:

Patrick Graydon

Research group:

Dependable Software Engineering

Publication Type:

Conference/Workshop Paper

Venue:

The 33rd International Conference on Computer Safety, Reliability and Security

Abstract

The Goal Structuring Notation (GSN) is a popular graphical notation for recording safety arguments. One of GSN’s key innovations is a context element that links short phrases used in the argument to detail available elsewhere. However, definitions of the context element admit multiple interpretations and conflict with guidance for building assured safety arguments. If readers do not share an understanding of the meaning of context that makes context’s impact on the main safety claim clear, confidence in safety might be misplaced. In this paper, we analyse the definitions and usage of GSN context elements, identify contradictions and vagueness, propose a more precise definition, and make updated recommendations for assured safety argument structure.

Bibtex

@inproceedings{Graydon3591,
author = {Patrick Graydon},
title = {Towards a Clearer Understanding of Context and Its Role in Assurance Argument Confidence},
month = {September},
year = {2014},
booktitle = {The 33rd International Conference on Computer Safety, Reliability and Security},
url = {http://www.es.mdu.se/publications/3591-}
}