Table 7 Experimental design matrix.

From: Multi-objective optimization of surface roughness and MRR in AISI 316L stainless steel processed by MQL end milling using taguchi, RSM, ANN, and RFR methods

Trial Number

Block Number

Coding

X1

X2

X3

1

1

 − 1

 − 1

 − 1

2

1

 − 1

1

 − 1

3

1

1

 − 1

 − 1

4

1

1

1

1

5

1

 − 1

 − 1

1

6

1

 − 1

1

1

7

1

1

 − 1

1

8

1

1

1

0

9

1

0

 − 1

0

10

1

0

1

0

11

1

 − 1

0

0

12

1

1

0

 − 1

13

1

0

0

1

14

1

0

0

0

15

1

0

0

0

16

1

0

0

0

17

1

0

0

0

18

1

0

0

0

19

1

0

0

0

20

1

0

0

0

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