Advances in Materials Science and Engineering

Research Article

Analysis of Drilling of Coir Fiber-Reinforced Polyester Composites Using Multifaceted Drill Bit

Table 3

Central composite rotatable design.
S. no.DesignA2 (X12)B2 (X2)C2 (X3)D2 (X4)AB (X1X2)AC (X1X3)AD (X1X4)BC (X2X3)BD (X2X4)CD (X3X4)
A (X1)B (X2)C (X3)D (X4)
1.−1−1−1−11111111111
2.1−1−1−11111−1−1−1111
3.−11−1−11111−111−1−11
4.11−1−111111−1−1−1−11
5.−1−11−111111−11−11−1
6.1−11−11111−11−1−11−1
7.−111−11111−1−111−1−1
8.111−1111111−11−1−1
9.−1−1−11111111−11−1−1
10.1−1−111111−1−111−1−1
11.−11−111111−11−1−11−1
12.11−1111111−11−11−1
13.−1−11111111−1−1−1−11
14.1−1111111−111−1−11
15.−11111111−1−1−1111
16.11111111111111
17.-20004000000000
18.20004000000000
19.0−2000400000000
20.02000400000000
21.00−200040000000
22.00200040000000
23.000−20004000000
24.00020004000000
25.00000000000000
26.00000000000000
27.00000000000000
28.00000000000000
29.00000000000000
30.00000000000000