Table 3. Suitable orthogonal arrays OA (27, 3⁶).

	FACTORS
Experiment No	A	B	C	D	E	F	Cooling Time (A)	Injection Pressure (B)	Injection Speed (C)	Melt Temperature (D)	Mold Temperature (E)	Wall Thickness (F)
1	1	1	1	1	1	1	5	250	5	470	150	2.10
2	1	1	1	1	2	2	5	250	5	470	155	2.15
3	1	1	1	1	3	3	5	250	5	470	160	2.20
4	1	2	2	2	1	1	5	450	10	480	150	2.10
5	1	2	2	2	2	2	5	450	10	480	155	2.15
6	1	2	2	2	3	3	5	450	10	480	160	2.20
7	1	3	3	3	1	1	5	650	15	490	150	2.10
8	1	3	3	3	2	2	5	650	15	490	155	2.15
9	1	3	3	3	3	3	5	650	15	490	160	2.20
10	2	1	2	3	1	2	10	250	10	490	150	2.15
11	2	1	2	3	2	3	10	250	10	490	155	2.20
12	2	1	2	3	3	1	10	250	10	490	160	2.10
13	2	2	3	1	1	2	10	450	15	470	150	2.15
14	2	2	3	1	2	3	10	450	15	470	155	2.20
15	2	2	3	1	3	1	10	450	15	470	160	2.10
16	2	3	1	2	1	2	10	650	5	480	150	2.15
17	2	3	1	2	2	3	10	650	5	480	155	2.20
18	2	3	1	2	3	1	10	650	5	480	160	2.10
19	3	1	3	2	1	3	15	250	15	480	150	2.20
20	3	1	3	2	2	1	15	250	15	480	155	2.10
21	3	1	3	2	3	2	15	250	15	480	160	2.15
22	3	2	1	3	1	3	15	450	5	490	150	2.20
23	3	2	1	3	2	1	15	450	5	490	155	2.10
24	3	2	1	3	3	2	15	450	5	490	160	2.15
25	3	3	2	1	1	3	15	650	10	470	150	2.20
26	3	3	2	1	2	1	15	650	10	470	155	2.10
27	3	3	2	1	3	2	15	650	10	470	160	2.15