The Taguchi Method, as outlined in the linked article, offers an intriquing method of developing products. This method involves looking at an array of variables involved in a product, identifying dependencies amongst them, and testing them all to assess effectiveness.

Taguchi’s objective is robust design, which means building a product, system, or process that works well even in the presence of degrading influences. That means products that deliver value without breaking and services that are enduring while being as simple as possible.
— Robert X. Cringely from i, cringely Sep 25, 2003

It is an admirable objective. I aspire for web sites I build to work well, even in the presence of degrading influences.

That said, I just got off the phone with a friend who cautioned me about this concept of making business decisions based on statistical analysis.

The point is, be God-led, not statistical-analysis led. Refer to the verse that identifies the wisdom of man as foolishness in God’s eyes. Certainly, the Taguchi Method is example of the wisdom of man. As far as I know, the method was devised entirely by man (Mr. Taguchi, actually). To solely use this method to make decisions seems foolish, according to scripture. No offense, Mr. Taguchi.

That said, there are many verses that tells us to seek knowledge, understanding, and wisdom. One of many examples is Proverbs 24:3-4 (ASV). “Through wisdom is a house builded; And by understanding it is established; And by knowledge are the chambers filled With all precious and pleasant riches.”

The Taguchi Method hopefully provides knowledge about what parts of a product are successful and not. Understanding that knowledge comes from studying it and perhaps discussing it with counselors. Wisdom would be knowing what to do with what you’ve learned, if anything