Condition | Predicted state | Parameter range | A possible influence of factors not modeled |
SI > 1.5 | Stable slope zone | Range cannot model instability | Significant destabilizing factors are required for instability |
1.5 > SI > 1.25 | Moderately stable zone | Range cannot model instability | Moderate destabilizing factors are required for instability |
1.25 > SI > 1.0 | Quasi-stable slope zone | Range cannot model instability | Minor destabilizing factors could lead to instability |
1.0 > SI > 0.5 | Lower threshold slope zone | Pessimistic half of range required for instability | Destabilizing factors are not required for instability |
0.5 > SI > 0.0 | Upper threshold slope zone | Optimistic half of range required for stability | Stabilizing factors may be responsible for stability |
0.0 > SI | Defended slope zone | Range cannot model stability | Stabilizing factors are required for stability |