Safety (S) Consequence Description | Probability of Failure | ||||
5 (occurs ≥ 5 times in a maintenance cycle) | 4 (occurs 4 times in a maintenance cycle) | 3 (occurs 3 times in a maintenance cycle) | 2 (occurs 2 times in a maintenance cycle) | 1 (occurs 0 - 1 time in a maintenance cycle) | |
Catastrophic (5) Large accident with more than 1 loss of life | 25 | 20 | 15 | 10 | 5 |
Severe (4) Accident leading to immediate fatality not more than 1 person | 20 | 16 | 12 | 8 | 4 |
Major (3) Physical disability or disfiguration | 15 | 12 | 9 | 6 | 3 |
Moderate (2) 1 or more severe injuries | 10 | 8 | 6 | 4 | 2 |
Minor (1) 1 or more minor injuries (First Aid cases) | 5 | 4 | 3 | 2 | 1 |