Optimization of Surface Roughness in Drilling Medium-Density Fiberboard with a Parallel Robot

Table 6

Results of ANOVA for surface roughness.

Variance source	Degree of freedom (DoF)	Sum of squares (SS)	PCR (%)	Mean of squares (MS)	F ratio	value
Ra
A	1	2.5696	16.89	2.56964	104.21	0.001
B	2	4.7151	30.99	2.35757	95.61	0.001
C	2	7.6358	50.18	3.81788	154.83	0.001
Error	12	0.2959	1.94	0.02466
Total	17	15.2165	100.00

Bold values show the most influential factor.