Multiobjective Optimization of WEDM Parameters on the Mg-HNT-Zr Hybrid Metal Matrix Composite Using Taguchi-Coupled GRA

Table 6

Calculated GRG and its order in the optimization process.

Trial. No	Normalized values		Grey relational coefficient		Grey relational grade	Rank
	MRR	Ra	MRR	Ra
1	0.800995	1	0.715302	1	0.857651	3
2	0.937811	0.967831	0.889381	0.939551	0.914466	2
3	1	0.911765	1	0.85	0.925	1
4	0.746269	0.806066	0.663366	0.72053	0.691948	6
5	0.803483	0.775735	0.717857	0.690355	0.704106	5
6	0.90796	0.715074	0.844538	0.637002	0.74077	4
7	0.70398	0.737132	0.628125	0.655422	0.641773	8
8	0.753731	0.698529	0.67	0.623853	0.646927	7
9	0.79602	0.605699	0.710247	0.559096	0.634671	9
10	0.475124	0.738971	0.487864	0.657005	0.572434	12
11	0.564677	0.69761	0.534574	0.623139	0.578857	11
12	0.711443	0.665441	0.634069	0.599119	0.616594	10
13	0.626866	0.186581	0.57265	0.380686	0.476668	21
14	0.691542	0.119485	0.618462	0.362184	0.490323	17
15	0.723881	0.054228	0.644231	0.345836	0.495033	16
16	0.21393	0.430147	0.388781	0.467354	0.428068	22
17	0.251244	0.357537	0.400398	0.437651	0.419025	24
18	0.323383	0.284007	0.424947	0.411187	0.418067	25
19	0.614428	0.44761	0.564607	0.475109	0.519858	15
20	0.676617	0.405331	0.607251	0.456759	0.532005	13
21	0.696517	0.351103	0.622291	0.4352	0.528746	14
22	0	0.704963	0.333333	0.628902	0.481118	20
23	0.21393	0.655331	0.388781	0.591948	0.490365	18
24	0.330846	0.591912	0.42766	0.550607	0.489133	19
25	0.38806	0.141544	0.449664	0.368065	0.408865	27
26	0.452736	0.071691	0.477435	0.350064	0.41375	26
27	0.524876	0	0.512755	0.333333	0.423044	23