Plackett–Burman Array
Is a serie of
Orthogonal Arrays with all the factors on two levels. Some of the Plackett–Burman Array are the same as the standard
Orthogonal Arrays.
Selecting a Orthogonal array
Menu => DOE => Factorial Array select the Orthogonal tab
Then Select the array
The arrays
| Name | Rows | 2 Levels |
| PB4 | 4 | 3 |
| PB8 | 8 | 7 |
| PB12 | 12 | 11 |
| PB16 | 16 | 15 |
| PB20 | 20 | 19 |
| PB24 | 24 | 23 |
| PB28 | 28 | 27 |
| PB32 | 32 | 31 |
| PB36 | 36 | 35 |
| PB40 | 40 | 39 |
| PB44 | 44 | 43 |
| PB48 | 48 | 47 |
When 4 or more levels are needed columns can be combined to achieve this (see
edit factorial array) .
PB4
| Tests ↓ | Factors |
| A | B | C |
| 1 | -1 | -1 | -1 |
| 2 | -1 | 1 | 1 |
| 3 | 1 | -1 | 1 |
| 4 | 1 | 1 | -1 |
PB8
| Tests ↓ | Factors |
| A | B | C | D | E | F | G |
| 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 |
PB12
| Tests ↓ | Factors |
| A | B | C | D | E | F | G | H | I | J | K |
| 1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 |
| 2 | -1 | -1 | -1 | -1 | -1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 3 | -1 | -1 | 1 | 1 | 1 | -1 | -1 | -1 | 1 | 1 | 1 |
| 4 | -1 | 1 | -1 | 1 | 1 | -1 | 1 | 1 | -1 | -1 | 1 |
| 5 | -1 | 1 | 1 | -1 | 1 | 1 | -1 | 1 | -1 | 1 | -1 |
| 6 | -1 | 1 | 1 | 1 | -1 | 1 | 1 | -1 | 1 | -1 | -1 |
| 7 | 1 | -1 | 1 | 1 | -1 | -1 | 1 | 1 | -1 | 1 | -1 |
| 8 | 1 | -1 | 1 | -1 | 1 | 1 | 1 | -1 | -1 | -1 | 1 |
| 9 | 1 | -1 | -1 | 1 | 1 | 1 | -1 | 1 | 1 | -1 | -1 |
| 10 | 1 | 1 | 1 | -1 | -1 | -1 | -1 | 1 | 1 | -1 | 1 |
| 11 | 1 | 1 | -1 | 1 | -1 | 1 | -1 | -1 | -1 | 1 | 1 |
| 12 | 1 | 1 | -1 | -1 | 1 | -1 | 1 | -1 | 1 | 1 | -1 |
PB16
| Tests ↓ | Factors |
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O |
| 1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 |
| 2 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 3 | -1 | -1 | -1 | 1 | 1 | 1 | 1 | -1 | -1 | -1 | -1 | 1 | 1 | 1 | 1 |
| 4 | -1 | -1 | -1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | -1 | -1 | -1 | -1 |
| 5 | -1 | 1 | 1 | -1 | -1 | 1 | 1 | -1 | -1 | 1 | 1 | -1 | -1 | 1 | 1 |
| 6 | -1 | 1 | 1 | -1 | -1 | 1 | 1 | 1 | 1 | -1 | -1 | 1 | 1 | -1 | -1 |
| 7 | -1 | 1 | 1 | 1 | 1 | -1 | -1 | -1 | -1 | 1 | 1 | 1 | 1 | -1 | -1 |
| 8 | -1 | 1 | 1 | 1 | 1 | -1 | -1 | 1 | 1 | -1 | -1 | -1 | -1 | 1 | 1 |
| 9 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 |
| 10 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 |
| 11 | 1 | -1 | 1 | 1 | -1 | 1 | -1 | -1 | 1 | -1 | 1 | 1 | -1 | 1 | -1 |
| 12 | 1 | -1 | 1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | -1 | 1 | -1 | 1 |
| 13 | 1 | 1 | -1 | -1 | 1 | 1 | -1 | -1 | 1 | 1 | -1 | -1 | 1 | 1 | -1 |
| 14 | 1 | 1 | -1 | -1 | 1 | 1 | -1 | 1 | -1 | -1 | 1 | 1 | -1 | -1 | 1 |
| 15 | 1 | 1 | -1 | 1 | -1 | -1 | 1 | -1 | 1 | 1 | -1 | 1 | -1 | -1 | 1 |
| 16 | 1 | 1 | -1 | 1 | -1 | -1 | 1 | 1 | -1 | -1 | 1 | -1 | 1 | 1 | -1 |
Links