Orthogonal Arrays

• The way to define the pair-wise combinations is to start with a standard orthogonal array (computed from a very complex formula

• The array is used by mapping problem values onto the standard array values.

A B C

1 1 3

1 2 2

1 3 1

2 1 2

2 2 1

2 3 3

3 1 1

3 2 3

3 3 2

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