Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Model of Operational Situation Analysis with Functional Safety for ASIL Determination

ASIL 결정을 위한 기능안전 운전상황 분석 모형

  • Baek, Myoung-Sig (Busan & Gyeongnam Regional Division, Korean Founation for Quality) ;
  • Jang, Hyeon Ae (Department of Systems Management and Engineering, Pukyong National University) ;
  • Kwon, Hyuck Moo (Department of Systems Management and Engineering, Pukyong National University)
  • 백명식 (한국품질재단 부산경남지역본부) ;
  • 장현애 (부경대학교 시스템경영공학부) ;
  • 권혁무 (부경대학교 시스템경영공학부)
  • Received : 2014.02.13
  • Accepted : 2014.07.15
  • Published : 2014.08.31
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Abstract

To determine a proper ASIL for each hazardous event with a proper safety goal, the right classes should first be determined for the three properties of the hazardous event; (i) severity of harm from the resultant accident, (ii) exposure to the relevant operational situation, and (iii) controllability to avoid the induced risks. ASIL can be clearly determined with right classes of these three properties. But no specific methodologies or processes for their classification can be found in ISO 26262, except only a rough guideline with a simplified set of illustrative tables. In this paper, we try to present a systematic model for classifying the three properties of the hazardous event and suggest a refined procedure of ASIL determination. The proposed model provides a specific method to get a more objective ASIL compared with that in the standard. Scrutinizing the current methodology, we develop a refined method and also provide an illustrative example.

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References

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