| Likelihood of Occurrence (LO) |
| 0.033 |
Almost impossible - only in extreme circumstances |
| 1 |
Highly Unlikely - though conceivable |
| 1.5 |
Unlikely - but could occur |
| 2 |
Possible - but unusual |
| 5 |
Even Chance - could happened |
| 8 |
Probable - not surprising |
| 10 |
Likely - to be expected |
| 15 |
Certain - no doubt that it will occur |
| Frequency of Exposure (FE) |
| 0.5 |
Annually |
| 1 |
Monthly |
| 1.5 |
Weekly |
| 2.5 |
Daily |
| 4 |
Hourly |
| 5 |
Constantly |
| Degree of Potential Harm (DPE) |
| 0.1 |
Scratch/Bruise |
| 0.5 |
Laceration or mild ill-effect |
| 2 |
Break of a minor bone or minor illness (temporary) |
| 4 |
Break of a major bone or major illness (temporary) |
| 6 |
Loss of one limb, eye, hearing (permanent) |
| 10 |
Loss of two limbs or eyes (permanent) |
| 15 |
Fatality |
| Number of Persons at Risk (NP) |
| 1 |
1-2 persons |
| 2 |
3-7 persons |
| 4 |
8-15 persons |
| 8 |
16-50 persons |
| 12 |
50 + persons |