Ranking the risk assessment criteria
| Rating | Detection (D) | Rating | Occurrence(O) | Rating | Severity(S) |
|---|---|---|---|---|---|
| 10 | Absolute uncertainty | 10 | (>1in 2) Very High | 10 | Hazardous without warning |
| 9 | Very remote | 9 | (1in 3) Very High | 9 | Hazardous with warning |
| 8 | Remote | 8 | (1in 8) High | 8 | Very high |
| 7 | Very low | 7 | (1in 20) High | 7 | High |
| 6 | Low | 6 | (1in 80) Moderate | 6 | Moderate |
| 5 | Moderate | 5 | (1in 400) Moderate | 5 | Low |
| 4 | Moderately high | 4 | (1in 2000) Moderate | 4 | Very low |
| 3 | High | 3 | (1in 15,000) Low | 3 | Minor |
| 2 | Very high | 2 | (1in 150000) Low | 2 | Very minor |
| 1 | Almost certain | 1 | (1in 1500000) Remote | 1 | None |
| Rating | Detection (D) | Rating | Occurrence(O) | Rating | Severity(S) |
|---|---|---|---|---|---|
| 10 | Absolute uncertainty | 10 | (>1in 2) Very High | 10 | Hazardous without warning |
| 9 | Very remote | 9 | (1in 3) Very High | 9 | Hazardous with warning |
| 8 | Remote | 8 | (1in 8) High | 8 | Very high |
| 7 | Very low | 7 | (1in 20) High | 7 | High |
| 6 | Low | 6 | (1in 80) Moderate | 6 | Moderate |
| 5 | Moderate | 5 | (1in 400) Moderate | 5 | Low |
| 4 | Moderately high | 4 | (1in 2000) Moderate | 4 | Very low |
| 3 | High | 3 | (1in 15,000) Low | 3 | Minor |
| 2 | Very high | 2 | (1in 150000) Low | 2 | Very minor |
| 1 | Almost certain | 1 | (1in 1500000) Remote | 1 | None |
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