HRN Calculator

Step 1: Task Details

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Step 2: HRN (Initial)

Likelihood of Occurrence (LO):

Frequency of Exposure (FE):

Degree of Possible Harm (DPH):

Number of Persons at Risk (NP):

Step 3: PLr: Severity

S1: Slight (reversible injury) S2: Serious (irreversible injury)

Step 4: PLr: Frequency

F1: Rare or short exposure F2: Frequent or long exposure

Step 5: PLr: Possibility

P1: Possible to avoid P2: Barely possible to avoid

Step 6: Remediation

New Likelihood (LO):

New Frequency (FE):

New Degree of Possible Harm (DPH):

New Number of Persons at Risk (NP):