Risk Assessment
Risk matrix and hazard register
ALARP Boundary
Intolerable Region
Risk cannot be justified. Activity must be modified or stopped regardless of cost. Corresponds to Extreme risk cells.
ALARP Region
As Low As Reasonably Practicable. Risk must be reduced where practicable. Mitigations required. Corresponds to Medium and High risk cells.
Broadly Acceptable Region
Risk is acceptable with routine monitoring. No additional mitigation required beyond standard controls. Corresponds to Low risk cells.
5x5 Risk Assessment Matrix — Pre-mitigation
Negligible
Minor
Moderate
Major
Catastrophic
Rare
Unlikely
Possible
Likely
Almost Certain
Severity (Consequence)
low
medium
high
extreme