Optimization on Material Removal Rate and Surface Roughness of Stainless Steel 304 Wire Cut EDM by Response Surface Methodology

Table 10

Coefficients of estimated regression for material removal rate (MRR).

Term	Coef	SE coef	T	P
Constant	−53.3003	6.42397	−8.297	0.000
A	0.986	0.1209	8.155	0.000
B	0.2197	0.06317	3.477	0.006
C	−0.0424	0.04366	−0.971	0.354
AA	−0.0046	0.00052	−8.963	0.000
B B	−0.0009	0.00048	−1.901	0.087
C C	0.0003	0.00011	2.509	0.031
A B	0.001	0.00025	4.082	0.002
A C	0.0001	0.00013	0.652	0.529
B C	−0.0013	0.00013	−10.043	0.000
S	R-Sq		R-Sq(Adj)
0.07379	97.00%		94.40%