Table 2: Fractional factorial design .

Run Factors
X1 X2 X3 X4 X5 X6
1 -1 -1 -1 -1 -1 -1
2 -1 -1 -1 1 1 1
3 -1 -1 1 -1 1 1
4 -1 -1 1 1 -1 -1
5 -1 1 -1 -1 1 -1
6 -1 1 -1 1 -1 1
7 -1 1 1 -1 -1 1
8 -1 1 1 1 1 -1
9 1 -1 -1 -1 -1 1
10 1 -1 -1 1 1 -1
11 1 -1 1 -1 1 -1
12 1 -1 1 1 -1 1
13 1 1 -1 -1 1 1
14 1 1 -1 1 -1 -1
15 1 1 1 -1 -1 -1
16 1 1 1 1 1 1