| ANOVA | Analysis of Variance |
| ANN | Artificial Neural Network |
| AISI | American Iron and Steel Institute |
| RSM | Response Surface Methodology |
| Ra | Arithmetic Mean Value of Profile (µm) |
| Vt | Tangential Vibration (Hz) |
| Va | Axial Vibration (Hz) |
| Vr | Radial Vibration (Hz) |
| p | Probability of Significance |
| F | Variance Ratio |
| MS | Mean of Squares |
| SS | Sum of Squares |
| DF | Degree of Freedom |
| Vc | Cutting Speed (m/min) |
| κ | Cutting edge angle (°) |
| f | Feed Rate (mm/rev) |
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