Table 8 Results of sensitivity analysis (Sobol’s indexes)
Transformation | Z-score | 0–1 | Ranks |
|---|---|---|---|
First order sensitivity index | |||
 Distance type (n = 6) | 3.34 | 6.05 | 3.12 |
 Aggregation method (n = 4) | 0.01 | 0.10 | 0.83 |
 Accessibility measure (n = 14) | 86.00 | 79.91 | 74.17 |
Second order sensitivity index (interaction) | |||
 Distance type versus aggregation method | 0.02 | 0.01 | 0.24 |
 Distance type versus accessibility measure | 10.19 | 13.52 | 19.76 |
 Aggregation method versus accessibility measure | 0.15 | 0.31 | 1.33 |
Total explained variance | 99.71 | 99.89 | 99.44 |
Total sensitivity index | |||
 Distance type | 13.55 | 19.58 | 23.12 |
 Aggregation method | 0.18 | 0.41 | 2.40 |
 Accessibility measure | 96.34 | 93.73 | 95.25 |