Table 12.

${\mathit{\eta }}_{\mathit{t}\mathit{h}}$, ${\mathit{\eta }}_{\mathit{e}\mathit{x}}$, ${\dot{\mathit{C}}}_{\mathit{s}\mathit{i}\mathit{s}}$, and ${\mathit{C}}_{\mathit{e}\mathit{l}}$ results and S/N ratios according to L₁₈ orthogonal array.

Exp.No	Control factors and levels							Responses				$\mathit{S}/\mathit{N}$ ratios
	A	B	C	D	E	F	G	${\mathit{\eta }}_{\mathit{t}\mathit{h}}$	${\mathit{\eta }}_{\mathit{e}\mathit{x}}$	${\dot{\mathit{C}}}_{\mathit{s}\mathit{y}\mathit{s}}$ ($\$/h$)	${\mathit{C}}_{\mathit{e}\mathit{l}}$ $(\$/kWh$)	${\mathit{\eta }}_{\mathit{t}\mathit{h}}$	${\mathit{\eta }}_{\mathit{e}\mathit{x}}$	${\dot{\mathit{C}}}_{\mathit{s}\mathit{y}\mathit{s}}$	${\mathit{C}}_{\mathit{e}\mathit{l}}$
1	1	1	1	1	1	1	1	0.13	0.58	0.767	0.045	−17.5	−4.8	2.3	27.0
2	1	2	2	2	2	2	2	0.17	0.60	0.878	0.042	−15.3	−4.4	1.1	27.6
3	1	3	3	3	3	3	3	0.19	0.61	0.932	0.040	−14.3	−4.3	0.6	27.9
4	2	1	1	2	2	3	3	0.15	0.64	0.844	0.043	−16.4	−3.9	1.5	27.4
5	2	2	2	3	3	1	1	0.19	0.67	0.897	0.040	−14.4	−3.5	0.9	27.9
6	2	3	3	1	1	2	2	0.15	0.49	0.929	0.046	−16.4	−6.3	0.6	26.8
7	3	1	2	1	3	2	3	0.11	0.50	0.739	0.047	−18.8	−6.0	2.6	26.5
8	3	2	3	2	1	3	1	0.15	0.53	0.858	0.045	−16.2	−5.5	1.3	26.9
9	3	3	1	3	2	1	2	0.23	0.73	1.049	0.040	−12.9	−2.7	−0.4	28.1
10	4	1	3	3	2	2	1	0.12	0.53	0.684	0.048	−18.3	−5.5	3.3	26.3
11	4	2	1	1	3	3	2	0.16	0.55	1.005	0.045	−15.8	−5.2	0.0	26.9
12	4	3	2	2	1	1	3	0.17	0.56	1.099	0.048	−15.4	−5.1	−0.8	26.4
13	5	1	2	3	1	3	2	0.14	0.59	0.845	0.048	−17.1	−4.6	1.5	26.5
14	5	2	3	1	2	1	3	0.12	0.43	1.017	0.055	−18.2	−7.2	−0.1	25.4
15	5	3	1	2	3	2	1	0.19	0.61	1.192	0.046	−14.4	−4.3	−1.5	27.0
16	6	1	3	2	3	1	2	0.11	0.47	0.691	0.052	−19.3	−6.6	3.2	25.6
17	6	2	1	3	1	2	3	0.20	0.70	1.102	0.044	−14.1	−3.1	−0.8	27.0
18	6	3	2	1	2	3	1	0.16	0.49	1.090	0.050	−16.1	−6.1	−0.7	25.7