According to API 580, Section 3.1.28, the definition is clearly stated:
“Logic model: A tool used to depict the effectiveness in depicting a combination of events that could result in a loss of containment event.”
While a physical model (Option A) may represent the progression of release events, and other options (B and D) are not defined within API 580, only a logic model fits the definition used in RBI methodologies to evaluate event combinations leading to failure.
[Reference: API 580, 2nd Edition (2016), Section 3.1.28, —]
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