Kowalick Arrays Result in Taguchi Testing Sometimes

Dr. Kowalich modified some of the Taguchi arrays in order to give more factors for testing without regard to factor interactions. To this end, he used the L₁₂(2¹¹) and L₁₈(2¹ X 3⁷) due to these arrays having the interactions distributed evenly across the array columns. Here is a list of the Kowalich arrays. Read more

Regarding Website Optimization Software

The solution you choose will depend on the volume of traffic you have. Taguchi type methods are based on what is called a fractional factorial test and use statistical techniques to reduce the volume of traffic to get a significant test. The Google Website Optimizer is based on a full factorial test and will require much more traffic to get a significant result.

Let’s say you have 15 factors with 2 variation per factor. Using Taguchi based methods you have 18 page variations in the test. Using GWO (full factorial) you have 32,768 pages to test. To get a valid test Read more