PTFE in Wet and Dry Drilling: Two-Tier Modeling and Optimization through ANFIS

Table 6

ANOVA result of wet drilling.

Source	Sum of squares	df	Mean square	F-value	value	% contribution	Remarks
Model	2.66	9	0.2954	47.53	<0.0001	96.38	Significant
A-speed	0.2847	1	0.2847	45.8	<0.0001	10.32
B-feed	1.96	1	1.96	315.75	<0.0001	71.01
C-point angle	0.0392	1	0.0392	6.31	0.0224	1.42
AB	0.1776	1	0.1776	28.58	<0.0001	6.43
AC	0.077	1	0.077	12.38	0.0026	2.79
BC	0.0161	1	0.0161	2.58	0.1264	0.58
A^2	0.0661	1	0.0661	10.64	0.0046	2.39
B^2	0.0337	1	0.0337	5.43	0.0324	1.22
C^2	0.0008	1	0.0008	0.124	0.7291	0.03
Residual	0.1057	17	0.0062
Total	2.76	26