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A Study on Situation Analysis for ASIL Determination

Hyeon Ae Jang1, Hyuck Moo Kwon1, Sung-Hoon Hong2 , and Min Koo Lee3
1.Department of Systems Management and Engineering, Pukyong National University, Busan, Korea
2.Department of Industrial & Information Systems Engineering, Chonbuk National University, Jeonju, Korea
3.Department of Information and Statistics, Chungnam National University, Deajeon, Korea
Abstract—For developing a safety-related E/E system in compliance with ISO 26262, it is very important to determine a right ASIL for each hazardous event with a proper safety goal. ASIL depends on the three properties of the hazardous event, i.e. severity of harm from the resultant accident, exposure to the relevant operational situation, and controllability to avoid the relevant risks. Once the right classes are given for these three properties, ASIL can be clearly determined without any inconsistency among all the people concerned. But ISO 26262 does not provide specific methodologies or processes for clear classification of the three properties. Instead, it only provides a rough guideline with a simplified set of example tables. This study tries to present a refined procedure of ASIL determination. The modified approach provides a more systematic and specific method to get a more objective result. We scrutinize the current methodology first and develop a refined modification. We also provide an applicative illustration based on the example given in the standard.

Index Terms—ISO26262, automotive safety integrity level (ASIL), hazard analysis and risk assessment (H&R), operational situation

Cite: Hyeon Ae Jang, Hyuck Moo Kwon, Sung-Hoon Hong, and Min Koo Lee, "A Study on Situation Analysis for ASIL Determination," Journal of Industrial and Intelligent Information, Vol. 3, No. 2, pp. 152-157, June 2015. doi: 10.12720/jiii.3.2.152-157
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