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An Ontological Approach to Elicit Safety Requirements
Bombardier Transportation, Västerås, Sweden.
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.ORCID iD: 0000-0003-0757-822X
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.ORCID iD: 0000-0002-2615-6842
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.ORCID iD: 0000-0003-0904-3712
2017 (English)In: 24th Asia-Pacific Software Engineering Conference APSEC 2017, 2017, p. 713-718Conference paper, Published paper (Refereed)
Abstract [en]

Safety requirements describe risk mitigations against failures that may cause catastrophic consequences on human life, environment and facilities. To be able to implement the correct risk mitigations, it is fundamental that safety requirements are de- fined based on the results issued from the safety analysis. In this paper, we introduce a heuristic approach to elicit safety requirements based on the knowledge about hazard’s causes, hazard’s sources and hazard’s consequences (i.e. hazard’s components) acquired during the safety analysis. The proposed approach is based on a Hazard Ontology that is used to structure the knowledge about the hazards identified during the safety analysis in order to make it available and accessible for requirements elicitation. We describe how this information can be used to elicit safety requirements, and provide a guidance to derive the safety requirements which are appropriate to deal with the hazards they mitigate.

Place, publisher, year, edition, pages
2017. p. 713-718
Keywords [en]
Safety requirements, safety requirements elicitation, ontologies, hazards, hazard's components
National Category
Computer Systems
Identifiers
URN: urn:nbn:se:mdh:diva-37099DOI: 10.1109/APSEC.2017.91ISI: 000428733800084Scopus ID: 2-s2.0-85045921379ISBN: 978-1-5386-3681-7 (print)OAI: oai:DiVA.org:mdh-37099DiVA, id: diva2:1152901
Conference
24th Asia-Pacific Software Engineering Conference APSEC 2017, 04 Dec 2017, Nanjing, China
Projects
DPAC - Dependable Platforms for Autonomous systems and ControlAvailable from: 2017-10-26 Created: 2017-10-26 Last updated: 2018-05-11Bibliographically approved
In thesis
1. An Ontological Approach to Safety Analysis of Safety-Critical Systems
Open this publication in new window or tab >>An Ontological Approach to Safety Analysis of Safety-Critical Systems
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Safety-critical systems (SCSs) have become an intrinsic part of human dailylife in multiple domains, such as automotive, avionics, and rail industries. Such systems are not only required to implement the functionality they should provide, but also have to satisfy a set of safety requirements in order to ensure the mitigation of hazardous consequences.

It is fundamental that safety requirements are defined based on the results issued from safety analysis. Various studies have asserted that most significant flaws in the safety requirements are related to the omission of hazards and causes associated with the identified hazards in early stages of SCSs development. The main drawbacks of the current practice applied in safety analysis,lie in that:

due to the lack of a common understanding of the hazard concept, the hazards and their causes are typically identified in accordance to the intuition and experience of the analysts and,

analysts are inclined to identify generic causes for a certain hazard description, for example, “Design flaw, Coding error, and Human error”and,

there is an essential need to formalize the experience of the analysts in a structured way, in order to save effort and,

since traditional safety analysis techniques are usually based on well known system behaviors represented by models, such as automata and sequence diagrams, a new approach is needed when such behavioral models are not available.

These considerations motivate us to formulate the following general research question: How can safety analysis, within the context of safety-critical systems, be conducted to reduce the omission of potential hazards and their causes in early stages of the system development life-cycle?

In this thesis, we propose an ontological approach to safety analysis for safety-critical systems, which mainly consists of four pieces of work:

we propose an ontological interpretation of the hazard concept, calledthe Hazard Ontology (HO), to define an explicit representation of theknowledge of hazards and their relations with the system under analysisand existing environment and,

we propose an approach to identify hazards in early stages of thesafety-critical systems development, based on the HO and,

we propose an approach to identify the causes associated with a certain hazard description for safety-critical systems, based on the HO and,

we propose a heuristic approach to safety requirements elicitation,based on the HO.

Place, publisher, year, edition, pages
Västerås: Mälardalen University, 2017
Series
Mälardalen University Press Dissertations, ISSN 1651-4238 ; 251
Keywords
hazard analysis, ontologies, safety-critical systems, safety requirements elicitation
National Category
Embedded Systems
Research subject
Computer Science
Identifiers
urn:nbn:se:mdh:diva-37386 (URN)978-91-7485-371-1 (ISBN)
Public defence
2018-01-12, Delta, Mälardalens högskola, Västerås, 13:00 (English)
Opponent
Supervisors
Projects
DPAC
Available from: 2017-12-08 Created: 2017-12-08 Last updated: 2017-12-20Bibliographically approved

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Hänninen, KajZhou, JialeLundqvist, Kristina

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