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Categorical rankings (e.g., yes/no, high/medium/low) are another
approach used by assessors to estimate risk.
Categorical rankings can be used for the following purposes:
- To provide qualitative risk estimates. In some cases,
professional judgment or other qualitative evaluation techniques
may be used to place risks in categories such as low/medium/high
or yes/no.
- To translate qualitative judgments into a mathematical comparison.
These methods are often used in comparative risk exercises.
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Using Qualitative
Evaluation to Estimate Risk
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Relevant
guidelines section(s): 5.1.2
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