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Ranges and constrains.
| Independent variables (factors) | Levels | |
|---|---|---|
| -1 | +1 | |
| Concentration ratio GMS/lecithin (A) | 0.5 | 2.0 |
| Amount of Tween 80 (B) (mg) | 1.0 | 4.0 |
| Dependent variables (responses) | Constrains | |
| Size (nm) (Y1) | Minimized | |
| PDI (Y2) | Minimized | |
| EE% (Y3) | Maximized | |
