Environment (E) 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) Persistent and landscape scale environmental impact or loss of a significant portion of a valued species | 25 | 20 | 15 | 10 | 5 |
Severe (4) Impacts such as long-term and widespread environmental degradation | 20 | 16 | 12 | 8 | 4 |
Major (3) Impacts such as short term and widespread environmental degradation | 15 | 12 | 9 | 6 | 3 |
Moderate (2) Impacts such as localized and long-term environmental degradation | 10 | 8 | 6 | 4 | 2 |
Minor (1) Impacts such as localized and short-term environmental degradation | 5 | 4 | 3 | 2 | 1 |