Transit Safety Risk Assessment Methodologies (2021) / Chapter Skim
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7 Literature Review Introduction to Safety Risk Assessment Methodologies SRAs are one segment of the larger risk management process that an agency or organization engages in to ensure the safety of staff, the public, and the environment. Risk management encompasses the processes involved in assessing, prioritizing, and strategizing to manage and minimize risk.
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8 Transit Safety Risk Assessment Methodologies – Five-Step Risk Assessment -- Similar to Simplified International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) Risk Assessment (U.S.
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Literature Review 9 Military Standard 882 The MIL-STD-882 is the most frequently used risk assessment framework for public transit agencies in the United States. The method involves several key steps.
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Source: Prominiski and Chronley (2020)
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Literature Review 11 when all safety requirements are satisfied (CSA Working Group, 2020)
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12 Transit Safety Risk Assessment Methodologies Bowtie Method The bowtie method is a widely used qualitative assessment technique. This technique is used in the energy, chemical, and hazardous material transportation sectors.
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Source: CGE Risk Management Solutions (2015)
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14 Transit Safety Risk Assessment Methodologies Source: Kishore (2013)
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Literature Review 15 is the quantitative risk assessment system software developed by the University of Maryland for the U.S. government.
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16 Transit Safety Risk Assessment Methodologies tool offers an analyst the ability to consistently evaluate the risk of a potential event and can be applied when a scenario is too complex to make reasonable risk judgments based purely on qualitative judgment. The LOPA can also be used as a "screening tool prior to a more rigorous quantitative risk assessment" (Center for Chemical Process Safety, 2001)
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Literature Review 17 consequence severity and then calculating a weighted average. The RCRMS method is similar to many other commonly used risk assessment methods in its components of probability, frequency, and consequence severity.
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18 Transit Safety Risk Assessment Methodologies Source: Tsegaye (2019)
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Literature Review 19 Fuzzy Reasoning Fuzzy reasoning is a method used most often within the engineering, artificial intelligence, and financial sectors. The application of fuzzy reasoning to rail safety was investigated at the University of Birmingham in England by Yao Chen in his thesis, Improving Railway Safety: Risk Assessment Study, in 2012.
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