Table 4 Description of the likelihood criteria
From: Semi-quantitative risk analysis of a normally unmanned installation facility
Ratings | Value criteria | |
|---|---|---|
Quantitative | Qualitative | |
1 | < 10-5 | Almost impossible |
2 | 10-5–10-4 | Very low |
3 | 10-4–10-2 | Low |
4 | 10-2–1 | Medium |
5 | > 1 | High |