Qualitative risk score scaling assigned to tree risk assessment methods to allow comparison of the different outputs and risk ratings for use in Minitab™.
| Risk scale rank | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Risk descriptor | Insignificant | Very low | Low | Minor/slight | Median | Medium/moderate | Moderate | Somewhat high | High | Extreme |
| Bartlett | 2 | 3 | 5 | 6 | - | 7 | 9 | 10 | 13 | 15 |
| CTC | 1 | - | - | 14 | 15 | - | 35 | 36 | 60 | N/A |
| HCC | 3 | - | - | - | - | - | - | - | 64 | N/A |
| MandC | - | - | 4 | - | - | 7 | - | - | 12 | N/A |
| Kenyon | < $100 | - | - | - | $10,000 | - | - | - | - | > $1m |
| Private 1 | 1 | - | 125 | 250 | - | 375 | - | - | 375 | 500 |
| Private 2 | - | 5 | 10 | - | 10 | - | 16 | - | 20 | 24 |
| Private 3 | - | 1 | 6 | - | 7 | - | 10 | 12 | 15 | 21 |
| QTRA | > 1:1m | - | - | < 1:10k | - | - | - | - | - | N/A |
| QTRA W | > 1:1m | - | - | < 1:10k | - | - | - | - | - | N/A |
| Threats | > 50 | 159 | 160 | 349 | 350 | - | 999 | 1000 | 2000 | 4000 |
| TRE QT | - | - | > 1:100k | - | - | - | - | < 1:10k | - | N/A |
| TRE QL | - | - | > 1:100k | - | - | - | - | < 1:10k | - | N/A |
| USDAFS 1 | - | - | 3 | - | - | 7 | - | - | 12 | N/A |
| USDAFS 2 | 0 | 1 | 2 | 3 | - | 4 | - | - | 6 | N/A |
| TRAQ | 1 | 2 | 3 | 4 | 6 | 8 | - | 9 | 12 | 16 |
Note. For some methods, the highest risk rating was extreme and for others high. For clarity and simplicity, this table only shows method scores that directly match the 10 point scale and/or the verbal descriptor of risk.