Gradient Boosted Trees Predictive Models for Surface Roughness in High-Speed Milling in the Steel and Aluminum Metalworking Industry

Table 14

Importance of the variables for the M1 geometries dataset.

Variable	Importance	Relative Importance	Percentage (%)
Hardness of the Material	413.6821	1.0000	45.82
Diameter of the Tool	188.2179	0.4550	20.85
Advance Speed-Feed Rate	122.5317	0.2962	13.57
Rotation Speed	118.9302	0.2875	13.17
Radial Depth of Cut	39.7190	0.0960	4.40
Axial Depth of Cut	19.8198	0.0479	2.20