Establishing an occupational health & safety management system based on ISO 45001

APPENDIX C: A 5X5 RISK MATRIX FOR SEVERITY AND LIKELIHOOD

Table C1 describes a 5x5 risk matrix for severity and likelihood.

Table C1: A 5x5 Risk Matrix

Table C2 gives a guideline for severity ratings.

Table C2: Guidance for Severity Rating

Level	Severity	Description
1	Negligible	Not likely to cause injury or ill health.
2	Minor	Injury or ill health requiring first aid only (includes minor cuts and bruises, irritation, ill health with temporary discomfort).
3	Moderate	Injury requiring medical treatment or ill health leading to disability (includes lacerations, burns, sprains, minor fractures, dermatitis, deafness, work-related upper limb disorders). ...