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Magnitude of different levels for the five factors selected for DOE analysis.
| Level | Velocity (m/s) | Cushion angle (degrees) | Cushion thickness (mm) | Cushion density (kg/m3) | Coefficient of friction |
|---|---|---|---|---|---|
| 1 | 0.1 | 0 | 20 | 20 | 0 |
| 2 | 0.3 | 10 | 60 | 30 | 0.3 |
| 3 | 0.5 | 20 | 100 | 40 | 0.6 |
| 4 | 0.7 | 30 | 140 | 50 | 0.9 |
