API 580 - Risk Based Inspection API-580 Question # 9 Topic 1 Discussion
API-580 Exam Topic 1 Question 9 Discussion:
Question #: 9
Topic #: 1
One of the significant differences between qualitative and semi-quantitative COF analysis for RBI is that the results of a semi-quantitative analysis are usually:
Section 5.3.5 of API 580 explains the nature of semi-quantitative RBI analysis:
“Semi-quantitative… is geared to obtain the major benefits of the previous two approaches (e.g. speed of the qualitative and rigor of the quantitative)… The results are usually given in consequence and probabilitycategories or as risk numbers, but numerical values may be associated with each category to permit the calculation of risk and the application of appropriate risk acceptance criteria.”
Therefore, semi-quantitative assessments often produce risk values in a numeric format, allowing comparative decision-making. This distinguishes them from purely qualitative assessments that rely on subjective categories like “High/Medium/Low.”
[Reference: API 580, 2nd Edition (2016), Section 5.3.5, ===========]
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