The Grey Theory Combining the Taguchi Method for the Best Parameters: A Case Study of Polishing M300 Steel

Table 8

Grey correlation coefficient of each experimental scheme.

Test No.	Grey correlation coefficient
	Material removal rate	Wear ratio	Surface roughness
1	0.3333	0.3492	0.4016
2	0.3579	0.3333	0.5204
3	0.3595	0.3667	1
4	0.3459	0.3548	0.4080
5	0.4648	0.6471	0.6456
6	0.3474	0.6111	0.3333
7	0.3416	0.3385	0.6375
8	0.3564	0.3548	0.4679
9	1	1	0.4722