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Generation of Safety Case Argument-Fragments from Safety Contracts

Fulltext:


Authors:

Irfan Sljivo, Barbara Gallina, Jan Carlson, Hans Hansson

Research groups:

Dependable Software Engineering
Safety-Critical Engineering

Publication Type:

Conference/Workshop Paper

Venue:

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

DOI:

10.1007/978-3-319-10506-2

Abstract

Certification of safety-critical systems is a costly and time-consuming activity. To reduce the cost of certification and time-to-market, composable safety certification envisions reuse of safety case argument-fragments together with safety-relevant components developed out-of-context. The argument-fragments could cover safety aspects relevant for different contexts in which the component can be used. Creating argument-fragments for such out-of-context components is also time-consuming and currently no satisfying approach exists to facilitate their automatic generation. In this work we propose (semi-)automatic generation of argument-fragments from assumption/guarantee safety contracts. We use the contracts to capture the safety claims related to the component, including supporting evidence. We provide an overview of the argument-fragment architecture and rules for automatic generation, including their application in an illustrative example. By automating generation of argument-fragments, we enable safety engineers to focus on increasing the confidence in the knowledge about the system, rather than documenting a safety case.

Bibtex

@inproceedings{Sljivo3589,
author = {Irfan Sljivo and Barbara Gallina and Jan Carlson and Hans Hansson},
title = {Generation of Safety Case Argument-Fragments from Safety Contracts},
isbn = {978-3-319-10505-5},
pages = {170--185},
month = {September},
year = {2014},
booktitle = {The 33rd International Conference on Computer Safety, Reliability and Security},
url = {http://www.es.mdu.se/publications/3589-}
}