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Olivier IDDIR: Project Engineer, Expertise and Modeling Department, QHSES Division, Technip
INTRODUCTION
When carrying out risk analyses, safety barriers are valued in order to justify that risks are prevented and controlled. Several questions spring to mind:
Are there enough safety barriers?
How do you precisely define the need for risk reduction?
Are the barriers in place sufficient to justify an acceptable residual risk?
The LOPA (Layer of Protection Analysis) method is used to evaluate all layers of protection (organizational and technical barriers), providing pragmatic answers to the above questions.
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LOPA: a risk analysis method
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Olivier Iddir — The LOPA method: principles — SE 4075
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