| Matrix | Severity categories | |||
| I (1) | II (2) | III (3) | ||
| Likelihood Categories | A (3) | M (3) | H (6) | H (9) |
| B (2) | L (2) | M (4) | H (6) | |
| C (1) | L (1) | L (2) | M (3) | |
| Risk score rating | Low (<3) | Moderate (3 - 6) | High (>6) | |