Table 5.
Orthogonal test design.
| Formula No. | A | B | C |
|---|---|---|---|
| 1 | 1 | 1 | 1 |
| 2 | 1 | 2 | 2 |
| 3 | 1 | 3 | 3 |
| 4 | 1 | 4 | 4 |
| 5 | 2 | 1 | 2 |
| 6 | 2 | 2 | 1 |
| 7 | 2 | 3 | 4 |
| 8 | 2 | 4 | 3 |
| 9 | 3 | 1 | 3 |
| 10 | 3 | 2 | 4 |
| 11 | 3 | 3 | 1 |
| 12 | 3 | 4 | 2 |
| 13 | 4 | 1 | 4 |
| 14 | 4 | 2 | 3 |
| 15 | 4 | 3 | 2 |
| 16 | 4 | 4 | 1 |
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