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

Table 11

Variance analysis of material removal rate (MRR).

Source	DF	Seq SS	Adj SS	Adj MS	F	P
Regression	9	1.78682	1.78682	0.198536	36.46	0.000
Linear	3	0.09402	0.76464	0.254879	46.81	0.000
Square	3	1.0506	1.09863	0.366211	67.26	0.000
Interactions	3	0.6422	0.6422	0.214067	39.32	0.000
Residual error	10	0.05445	0.05445	0.005445	-	-
Lack of fit	5	0.05275	0.05275	0.010549	31.03	0.001
Pure error	5	0.0017	0.0017	0.00034	-	-
Total	19	1.84127	-	-	-	-