UNDERSTAND THE CONCEPT
A risk matrix places likelihood and consequence estimates into categories. It can help teams organize priorities, but its colors and numbers are simplified representations of a more complicated situation. Results depend on the definitions, evidence, and assumptions used. Two reviewers can produce different ratings when they imagine different exposure conditions or consequences, even if both are looking at the same task.
Record the scenario behind the rating and distinguish existing controls from proposed ones. Avoid comparing scores from different matrices as though they share a common scale. A low category does not remove applicable requirements or replace specialist assessment. Rare but severe events deserve attention even when likelihood is uncertain. Qualified reviewers should select methods appropriate to the hazard and revisit assessments when conditions change, following approved site procedures rather than relying on a color alone.
Questions to take back to your team
- What scenario and exposure assumptions produced this rating?
- Are the matrix definitions consistent across compared records?
- Does uncertainty or consequence severity require specialist review?
Awareness guide only. Follow applicable requirements, qualified review and your site’s approved procedures. Reading this page does not authorize work or certify competence.
Further reading
Explore the primary references below. Requirements and applicability depend on your organization and jurisdiction.
