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An Ontological Approach to Hazard Identification for Safety-Critical Systems
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems. IS (Embedded Systems).ORCID iD: 0000-0002-2615-6842
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems. IS (Embedded Systems).ORCID iD: 0000-0003-0757-822X
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems. IS (Embedded Systems).ORCID iD: 0000-0003-0904-3712
Mälardalen University, School of Innovation, Design and Engineering, Embedded Systems.
2017 (English)In: 2017 2nd International Conference on Reliability Systems Engineering, ICRSE 2017, Beijing, China, 2017, article id 8030746Conference paper, Published paper (Refereed)
Abstract [en]

Hazard identification is an essential but very de- manding task for the development of safety-critical systems (SCSs). Current practices suffer from one or several drawbacks listed below: 1) a common hazard conceptualization is missing and thereby ambiguities may arise and, 2) there is still a need to formalize the experience of analysts and lessons learned from previous system development in a structured way to facilitate future reuse. and, 3) some hazard identification techniques require well-known system behaviors represented by models, such as automata and sequence diagrams, to identify hazards, and however such models are typically susceptible to changes or even not available in early stages. In this paper, we propose an ontological approach to support hazard identification in the early stages of the development of SCSs. The approach aims to improve hazard identification results in terms of completeness and unambiguity. A robotic strolling assistant system is used to evaluate the proposed approach.

Place, publisher, year, edition, pages
Beijing, China, 2017. article id 8030746
Keyword [en]
hazard ontologyhazard identificationpreliminary hazard analysissafety-critical systems
National Category
Engineering and Technology Computer and Information Sciences
Identifiers
URN: urn:nbn:se:mdh:diva-35514DOI: 10.1109/ICRSE.2017.8030746ISI: 000425930200036Scopus ID: 2-s2.0-85032291985ISBN: 9781538609187 (print)OAI: oai:DiVA.org:mdh-35514DiVA, id: diva2:1105803
Conference
2nd International Conference on Reliability Systems Engineering, ICRSE 2017; Beijing Yanqi Lake International Convention and Exhibition Center (BYCC)Huairou, Beijing; China; 10 July 2017 through 12
Projects
DPAC - Dependable Platforms for Autonomous systems and Control
Available from: 2017-06-05 Created: 2017-06-05 Last updated: 2018-03-15Bibliographically 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
Keyword
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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Zhou, JialeHänninen, KajLundqvist, Kristina

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