Exam CCPSC Topic 1 Question 29 Discussion

The correct answer is A (Failure Modes and Effects Analysis - FMEA) because it is generally considered the most quantitative (or semi-quantitative) among the listed HIRA methods.
FMEA systematically evaluates potential failure modes, their causes, and consequences, and assigns numerical rankings such as severity, occurrence, and detectability. These rankings are often combined into a Risk Priority Number (RPN) , providing a structured and numerical basis for prioritizing risks. This quantitative scoring distinguishes FMEA from more qualitative methods.
In contrast, What-If (B) and What-If/Checklist (C) are largely qualitative brainstorming techniques , relying on team experience rather than numerical scoring. HAZOP (E) is a highly structured and systematic method but is still primarily qualitative , focusing on deviations and consequences without assigning numerical risk values. Bow-Tie Analysis (D) is mainly a visual and qualitative method , illustrating barriers and pathways between causes and consequences.
CCPS categorizes HIRA methods along a spectrum from qualitative to quantitative. FMEA lies toward the semi-quantitative end , making it particularly useful when organizations need prioritized, numerically supported risk evaluations while still maintaining practicality in application.