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Table 1 Orthogonality. The relationship between one column and another is arranged so that for each level within one column, each level within any other column occurs an equal number of times as well. Factor A, at level 1 occurs 4 times and at level 2 occurs 4 times as well. This equal occurrence is true for all factors involved in any orthogonal array.

From: Evaluation of the Taguchi methods for the simultaneous assessment of the effects of multiple variables in the tumour microenvironment

 

A

B

C

D

E

F

G

Results

1

1

1

1

1

1

1

1

Y1

2

1

1

1

2

2

2

2

Y2

3

1

2

2

1

1

2

2

Y3

4

1

2

2

2

2

1

1

Y4

5

2

1

2

1

2

1

2

Y5

6

2

1

2

2

1

2

1

Y6

7

2

2

1

1

2

2

1

Y7

8

2

2

1

2

1

1

2

Y8