Number of exp. X1 X2 X3
1 - - -
2 0 - -
3 + - -
4 - 0 -
5 0 0 -
6 + 0 -
7 - + -
8 0 + -
9 + + -
10 - - +
11 0 - +
12 + - +
13 - 0 +
14 0 0 +
15 + 0 +
16 - + +
17 0 + +
18 + + +
19 0 0 -
20 0 0 -
21 0 0 +
22 0 0 +
Table 5: Matrix of experiment for optimization.