What it means
A risk matrix is a simple chart. One side shows how likely the harm is. The other shows how severe it could be. Where the two meet gives a risk level, such as low, medium or high.
Companies build their own scale. The labels, the number of rows and what each level means differ. Use the one in your company's procedure so ratings are consistent between crews.
A matrix is a tool for judgment, not a replacement. Two people can rate the same hazard differently. The point is to talk it through and decide what to do first.
Why it matters
A site usually has more hazards than time or money. A matrix helps the lead decide which to fix first and which need work stopped until they're controlled.
What it looks like on a site
- The crew rates each hazard on the job plan before work starts.
- A high rating means the work stops or changes until the control is in place.
- After the control, the crew rates the hazard again to see what's left.
- Leads use the same scale across crews, so ratings can be compared.
This is general information, not legal advice. Check the current rule and your own procedures. Back to the glossary