Table 1.

Box–Behnken design matrix and experimental values obtained for resolutions and run time.

Run	Factors			Responses
	X1	X2	X3	Rs3–4	Rs4–5	Rs5–6	Rs6–7	Run Time (min)
1	0	0	0	1.50	3.62	3.34	1.74	2.761
2	1	0	1	1.22	3.68	2.72	1.31	2.326
3	0	0	0	1.77	4.53	4.10	2.02	2.775
4	0	−1	1	1.08	2.46	2.12	1.22	2.658
5	−1	0	−1	2.01	3.93	3.68	2.20	3.574
6	−1	0	1	1.00	2.83	2.79	1.27	2.659
7	0	1	1	1.18	3.53	3.08	1.47	2.210
8	0	0	0	1.36	3.62	2.89	1.41	2.759
9	0	1	−1	2.35	5.40	4.81	2.83	2.924
10	1	−1	0	1.25	3.60	3.49	1.75	2.892
11	0	−1	−1	1.80	3.88	4.01	2.35	3.699
12	−1	−1	0	1.13	3.38	3.05	1.61	3.242
13	−1	1	0	1.49	3.76	3.01	1.58	2.705
14	1	1	0	1.82	4.30	3.63	1.88	2.298
15	1	0	−1	2.02	4.33	4.91	2.92	3.199