L18 ORTHOGONAL ARRAY
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Expt. No.
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Col. 1
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Col.2
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Col.3
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Col.4
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Col.5
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Col.6
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Col.7
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Col.8
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1
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1
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1
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1
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1
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1
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1
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1
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1
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2
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1
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1
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2
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2
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2
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2
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2
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2
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3
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1
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1
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3
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3
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3
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3
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3
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3
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4
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1
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2
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1
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1
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2
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2
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3
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3
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5
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1
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2
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2
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2
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3
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3
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1
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1
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6
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1
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2
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3
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3
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1
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1
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2
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2
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7
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1
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3
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1
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2
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1
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3
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2
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3
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8
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1
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3
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2
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3
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2
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1
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3
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1
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9
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1
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3
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3
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1
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3
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2
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1
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2
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10
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2
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1
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1
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3
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3
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2
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2
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1
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11
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2
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1
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2
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1
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1
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3
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3
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2
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12
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2
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1
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3
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2
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2
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1
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1
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3
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13
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2
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2
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1
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2
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3
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1
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3
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2
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14
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2
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2
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2
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3
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1
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2
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1
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3
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15
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2
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2
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3
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1
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2
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3
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2
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1
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16
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2
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3
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1
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3
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2
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3
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1
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2
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17
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2
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3
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2
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1
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3
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1
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2
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3
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18
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2
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3
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3
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2
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1
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2
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3
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1
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