Table 6: Portion of the 27 factorial experimental design applied on the factors to simulate their impact on the circuit performances.
Factorial design.
| Test # | Primary Separators | Secondary Separators | Tertiary separators | ||||
| Speed | Gate | Speed | Gate 1 | Gate 2 | Speed | Gate | |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 |
| 2 | -1 | -1 | -1 | -1 | -1 | -1 | 1 |
| 3 | -1 | -1 | -1 | -1 | -1 | 1 | -1 |
| 4 | -1 | -1 | -1 | -1 | -1 | 1 | 1 |
| 5 | -1 | -1 | -1 | -1 | 1 | -1 | -1 |
| 6 | -1 | -1 | -1 | -1 | 1 | -1 | 1 |
| 7 | -1 | -1 | -1 | -1 | 1 | 1 | -1 |
| 8 | -1 | -1 | -1 | -1 | 1 | 1 | 1 |
| 9 | -1 | -1 | -1 | 1 | -1 | -1 | -1 |
| 10 | -1 | -1 | -1 | 1 | -1 | 1 | -1 |
| 11 | -1 | -1 | -1 | 1 | -1 | 1 | -1 |
| 12 | -1 | -1 | -1 | 1 | -1 | 1 | 1 |
| 13 | -1 | -1 | -1 | 1 | 1 | -1 | -1 |
Variations of the factors
| Nominal | Low | High | |
| Primary Separators | |||
| Speed (RPM) | 37 | 34 | 40 |
| Gate (%) | 58 | 54 | 62 |
| Secondary Separators | |||
| Speed (RPM) | 26 | 23 | 29 |
| Gate 1 (%) | 47 | 43 | 51 |
| Gate 2 (%) | 93 | 90 | 96 |
| Tertiary Separators | |||
| Speed (RPM) | 26 | 23 | 29 |
| Gate (%) | 81 | 78 | 84 |