Investigation of Drilling Parameters Using Grey Relational Analysis and Response Surface Methodology of Biaxial Glass Fibre Reinforced with Modified Epoxy Resin Composite

Table 7

Grey relational rank.

S. number	Circularity grey relational coefficient	Delamination entry grey relational coefficient	Delamination exit grey relational coefficient	Surface roughness grey relational coefficient	Grey relational grade	Rank
1	0.395296753	0.689373297	0.62529274	0.87487375	2.584836539	6
2	0.375931842	0.685636856	0.708222812	0.996031084	2.765822594	4
3	0.526080477	0.681940701	0.628235294	1	2.836256472	3
4	0.339097022	0.664041995	0.439868204	0.89231715	2.335324371	16
5	0.535660091	0.65374677	1	0.959617618	3.149024479	1
6	0.397075366	0.643765903	0.397913562	0.96409658	2.402851411	13
7	0.363542739	0.630922693	0.388646288	0.690251269	2.07336299	31
8	0.456662354	0.624691358	0.970909091	0.686720798	2.738983601	5
9	0.457846952	0.618581907	0.530815109	0.78087968	2.388123649	14
10	0.554160126	0.612590799	0.631205674	0.471489399	2.269445997	18
11	0.433128834	0.469387755	0.53722334	0.542447351	1.982187281	35
12	0.340405014	0.587006961	0.875409836	0.683817818	2.486639629	9
13	0.718940937	0.410048622	0.518446602	0.461875194	2.109311355	28
14	0.507913669	0.342354533	0.333333333	0.471903695	1.65550523	53
15	0.552425665	1	0.905084746	0.548317934	3.005828344	2
16	0.333333333	0.537154989	0.514450867	0.415757041	1.800696231	48
17	0.375931842	0.44	0.482820976	0.421860885	1.720613704	52
18	0.535660091	0.412724307	0.441322314	0.428560029	1.818266741	43
19	0.461437908	0.647058824	0.643373494	0.416269426	2.168139652	26
20	0.398870056	0.515274949	0.74789916	0.380522195	2.04256636	31
21	0.733887734	0.681940701	0.407633588	0.442435227	2.265897249	19
22	0.466314399	0.553610503	0.445742905	0.414694413	1.88036222	40
23	0.411901984	0.515274949	0.978021978	0.443384933	2.348583844	15
24	0.579638752	0.667546174	0.610983982	0.443055727	2.301224635	17
25	0.439601494	0.452593918	0.345407503	0.383292296	1.620895211	54
26	0.409988386	0.47645951	0.73553719	0.333333333	1.955318419	37
27	0.435265105	0.472897196	0.461139896	0.442982637	1.812284834	46
28	0.339097022	0.426644182	0.435562806	0.535470362	1.736774373	51
29	0.420738975	0.407407407	0.462738302	0.526876024	1.817760708	44
30	0.710261569	0.444639719	0.493530499	0.615050734	2.263482521	20
31	0.362051282	0.428087986	0.438423645	0.661350902	1.889913816	38
32	0.340405014	0.433962264	0.459552496	0.609556779	1.843476553	42
33	0.804100228	0.464220183	0.44278607	0.700149925	2.411256406	12
34	0.410942957	0.450980392	0.539393939	0.588283621	1.989600909	33
35	1	0.444639719	0.481081081	0.5800553	2.5057761	8
36	0.436341162	0.47467167	0.552795031	0.670432557	2.13424042	27
37	0.972451791	0.452593918	0.569296375	0.481741283	2.476083367	10
38	0.521418021	0.576309795	0.675949367	0.487717386	2.261394569	22
39	0.433128834	0.333333333	0.697127937	0.525304198	1.988894303	34
40	0.716024341	0.546436285	0.530815109	0.409018903	2.202294638	24
41	0.461437908	0.976833977	0.448739496	0.375938008	2.262949389	21
42	0.7827051	0.44	0.416536661	0.387915779	2.02715754	32
43	0.470039947	0.465930018	0.469244288	0.481650553	1.886864807	39
44	0.433128834	0.469387755	0.419152276	0.46251561	1.784184475	49
45	0.436341162	0.367198839	0.516441006	0.536417028	1.856398035	41
46	0.834515366	0.551198257	0.602708804	0.428696867	2.417119294	11
47	0.502133713	0.576309795	0.579175705	0.445666155	2.103285368	29
48	0.718940937	0.455855856	0.518446602	0.539228483	2.232471878	23
49	0.468791501	0.429541596	0.445742905	0.462312553	1.806388554	47
50	0.333333333	0.433962264	0.469244288	0.535999441	1.772539327	50
51	0.461437908	0.568539326	0.481081081	0.689985225	2.201043541	25
52	0.420738975	0.459165154	0.524557957	0.412972433	1.817434519	45
53	0.375931842	0.423785595	0.669172932	0.493630281	1.96252065	36
54	0.526080477	0.551198257	0.708222812	0.789315109	2.574816654	7