Application of Response Surface Methodology and Central Composite Inscribed Design for Modeling and Optimization of Marble Surface Quality

Table 3

Experimental programme.

Test number	Coded level of variables			Actual level of variables
	1	1	−1	1	1.88	0.80	553.31
2	0	0	0	1.48	1.25	499.50
3	−1	1	1	1.07	1.70	553.31
4	0	0	1.682	1.48	1.25	590.00
5	0	0	−1.682	1.48	1.25	409.00
6	0	0	0	1.48	1.25	499.50
7	1	1	−1	1.88	1.70	445.69
8	−1	1	−1	1.07	1.70	445.69
9	0	−1.682	0	1.48	0.50	499.50
10	1	1	1	1.88	1.70	553.31
11	0	1.682	0	1.48	2.00	499.50
12	0	0	0	1.48	1.25	499.50
13	−1.682	0	0	0.80	1.25	499.50
14	0	0	0	1.48	1.25	499.50
15	0	0	0	1.48	1.25	499.50
16	−1	−1	−1	1.07	0.80	445.69
17	1.682	0	0	2.15	1.25	499.50
18	1	−1	−1	1.88	0.80	445.69
19	−1	−1	1	1.07	0.80	553.31
20	0	0	0	1.48	1.25	499.50