International Journal of Manufacturing Engineering / 2014 / Article / Tab 4

Research Article

Material Removal Rate, Electrode Wear Rate, and Surface Roughness Evaluation in Die Sinking EDM with Hollow Tool through Response Surface Methodology

Table 4

The analysis of variance for main and interaction effects of parameters on MRR.

SourceSSDOFMS valueProb > At 95% CI% contribution

Model364.25660.7143.10<0.0001Significant
A293.431293.43208.33<0.0001Significant57.19
B22.82122.8216.20 0.0024Significant11.97
C12.40112.408.80 0.0141Significant0.03
A213.14113.149.33 0.0122Significant3.25
AB8.2918.295.89 0.0356Significant6.65
BC14.18114.1810.06 0.0099Significant10.97
Lack of fit12.3162.054.62 0.0801Nonsignificant
0.9628
Adjusted 0.9404
Predicted 0.8179

CI: confidence interval; DOF: degrees of freedom; MS: mean sum of squares; SS: sum of squares.

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