Machining Parameters and Toolpath Productivity Optimization Using a Factorial Design and Fit Regression Model in Face Milling and Drilling Operations

Table 4

Nonlinear regression analysis carried out with the Levenberg–Marquardt algorithm.

Parameter	Estimate	SE estimate
x1	0.003014	0.003773
x2	0.639114	0.123164
x3	0.070207	0.078683

value: 0.623; maximum iterations: 200; tolerance: 0.00001; SE: standard error.