The barrier and operational risk analysis (BORA) project has developed a model for risk analysis based on the use of event trees, fault trees, influence diagrams, and risk influencing factors (RIFs). The model has been applied in some case studies in the project. The experience from these case studies has been used to develop a generalized methodology for analysis of operational barriers that are intended to prevent hydrocarbon leaks. A stepwise description of this generalized methodology is presented and discussed in the paper.
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