Coping with Complexity When Predicting Surface Roughness in Milling Processes: Hybrid Incremental Model with Optimal Parametrization

Table 2

Variables and intervals assigned.

State	(N); Label (lower, upper)	Ra; (μm); Label (lower, upper)
1	(22, 100)	Mirror (0.10, 0.25)
2	(101, 208)	Polished (0.25, 0.35)
3	(209, 324)	Ground (0.35, 0.75)
4	(324, 488)	Smooth (0.75, 1.50)