A Comprehensive Safety Engineering Approach for Software-Intensive Systems Based on STPA

Asim Abdulkhaleq, Stefan Wagner, Nancy Leveson

Research output: Contribution to journalConference articlepeer-review

65 Scopus citations

Abstract

Formal verification and testing are complementary approaches which are used in the development process to verify the functional correctness of software. However, the correctness of software cannot ensure the safe operation of safety-critical software systems. The software must be verified against its safety requirements which are identified by safety analysis, to ensure that potential hazardous causes cannot occur. The complexity of software makes defining appropriate software safety requirements with traditional safety analysis techniques difficult. STPA (Systems-Theoretic Processes Analysis) is a unique safety analysis approach that has been developed to identify system hazards, including the software-related hazards. This paper presents a comprehensive safety engineering approach based on STPA, including software testing and model checking approaches for the purpose of developing safe software. The proposed approach can be embedded within a defined software engineering process or applied to existing software systems, allow software and safety engineers integrate the analysis of software risks with their verification. The application of the proposed approach is illustrated with an automotive software controller.

Original languageEnglish
Pages (from-to)2-11
Number of pages10
JournalProcedia Engineering
Volume128
DOIs
StatePublished - 2015
Externally publishedYes
Event3rd European STAMP Workshop, STAMP EU 2015 - Amsterdam, Netherlands
Duration: 4 Oct 20156 Oct 2015

Keywords

  • model checking
  • safety verification
  • software sesting
  • STAMP
  • STPA

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