Optimization and Modeling of Radial Pitch Diameter Difference in Tapping of AISI H13

Table 7

ANOVA for RPDD.

	DoF	SS	MS	F test	value	PCR (%)
A	1	7.74	7.74	9.51	0.009	6.16
B	2	77.31	38.66	47.51	≤0.001	61.54
C	2	30.81	15.41	18.93	≤0.001	24.53
Re	12	9.76	0.81			7.77
Total	17	125.62				100

DoF: degrees of freedom; SS: sequential sum of squares; MS: mean sum of squares; Re: residual error.