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Abstract
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This paper introduces an information configuration for the HAZOP analysis entities, leading to a new barriers classification. The HAZOP analysis entities are formed in a tree data structure to facilitate data sharing and to provide a more comprehensive analysis. As an illustration, this data structure is used to analyze the risk for a gas furnace. This methodology can be applied to analyze the accident risk in the preliminary design stages and to enrich the risk information, during the implementation and operation phases.
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