3Interactive Risk Matrix
Click any cell to record a hazard at that Likelihood × Severity. The matrix produces a numeric risk score (1–25), an automatic rating, and the suggested hierarchy-of-controls level.
Risk matrix (click a cell)
Negligible
(1)
(1)
Minor
(2)
(2)
Moderate
(3)
(3)
Major
(4)
(4)
Catastrophic
(5)
(5)
Almost
Certain (5)
Certain (5)
5Med
10High
15High
20Extreme
25Extreme
Likely
(4)
(4)
4Low
8Med
12High
16High
20Extreme
Possible
(3)
(3)
3Low
6Med
9Med
12High
15High
Unlikely
(2)
(2)
2Low
4Low
6Med
8Med
10High
Rare
(1)
(1)
1Low
2Low
3Low
4Med
5Med
↑ Likelihood · → Severity
Risk rating
— score (L × S)
Click a cell
Likelihood—
Severity—
Recommended action—
Suggested hierarchy of controls
- Eliminate: remove the hazard (e.g., redesign, relocate, eliminate the task).
- Substitute: replace with a less hazardous alternative.
- Engineering: guards, ventilation, isolation, automation.
- Administrative: procedures, permits, training, signage.
- PPE: last line of defence — never the only control for High/Extreme.
Saved hazards
| # | Hazard | Loc | L | S | Score | Rating |
|---|
4Hierarchy of Controls Scorer
Drag the five control levels into the order you propose to apply them. The tool scores you against the recognised priority order (Elimination → Substitution → Engineering → Administrative → PPE) and warns when PPE is placed above engineered or substitution controls.
Score
— / 100
Drag controls into priority order and release to score.
19Bowtie Threat–Control Viewer
Build a simple bowtie around a top event: list threats on the left and consequences on the right; tag preventive (left) and mitigative (right) controls. Useful for major-accident hazards and IOGP-style risk reviews.
Coverage
Threats—
Preventive controls—
Mitigative controls—
Consequences—
Coverage indicator—
For training purposes only. Site-specific risk matrices and definitions vary; defer to your company's HSE management system.