Table 1 Probability of an Occurrence
Score | Probability | Description |
|---|---|---|
5 | Most Certain | Events are expected to occur or will occur periodically with high probability. More than once in a year |
4 | Likely | Events have a probability of happening. Once in 1–3 years |
3 | Possible | Events are likely to occur. Once in 3–5 years |
2 | Unlikely | Events can happen. Once in 5–10 years |
1 | Rare | Events are not likely to occur or will only occur in exceptional circumstances. Once in 10 or more years |