I found this L18-John array in SAS-JMP software which is not a typical Taguchi array.
Anyone know where this L18-John methodology come from ? any reference literature ?
Thanks a lot
Run1 1 1 1 1 1 1 1 1
Run2 1 1 2 2 3 2 2 2
Run3 1 1 3 3 2 3 3 3
Run4 1 2 1 2 2 2 3 1
Run5 1 2 2 3 1 3 1 2
Run6 1 2 3 1 3 1 2 3
Run7 1 3 1 3 3 2 1 3
Run8 1 3 2 1 2 3 2 1
Run9 1 3 3 2 1 1 3 2
Run10 2 1 1 3 2 1 2 2
Run11 2 1 2 1 1 2 3 3
Run12 2 1 3 2 3 3 1 1
Run13 2 2 1 1 3 3 3 2
Run14 2 2 2 2 2 1 1 3
Run15 2 2 3 3 1 2 2 1
Run16 2 3 1 2 1 3 2 3
Run17 2 3 2 3 3 1 3 1
Run18 2 3 3 1 2 2 1 2