The Consequences of a potential risk are rated from Negligible to Severe.
The Likelihood of a potential risk occurring is rated from Rare to Almost Certain.
| Consequences | How severely could someone be hurt? | Likelihood | How likely are the consequences? | |
| Severe | Death or permanent disability | Almost Certain | High Probability of an incident | |
| Significant | Serious injury, hospital treatment required | Likely | Likely Probability of an Incident | |
| Moderate | Injury requiring medical treatment and some lost time | Possible | Possible Probability of an Incident | |
| Minor | Minor injury, first aid only required | Unlikely | Unlikely Probability of an Incident | |
| Negligible | Unlikely to result in an injury | Rare | Rare Probability of an Incident |