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

Study Interactions Using The Taguchi Method

A rarely discussed and utilized property of the Taguchi Method is the study of interactions. Dr. Taguchi incorporated additional power in the use of orthogonal arrays for test design via the linear graph. Using these linear graphs it is possible to assign factors to the correct columns in order to study interactions between the factors while also revealing the effects of the individual factors.

Although it is not possible to study all interactions as can be done with the full factorial test, you can use your knowledge of Read more

If They Say This About Taguchi Testing Then Run Don’t Walk Away

OK, that title got your attention! What I am talking about? Well, some people promoting Taguchi methods of testing suggest that you can eliminate under performing test runs during the test. Here is a quote from the guy that runs StomperNet’s test software:

Lets say you are running a L18 — this has 18 different landing page recipies. While the test is running you will naturally see a couple of recipies that are doing significantly worse than the others. As this happens you can shut off these recipies. You can keep doing this until you are down to two recipies — i.e. - a split test which will confirm the results from the teguchi test.

Read more