Using Design of Experiments

Posted on March 17, 2006  Comments (4)

How to Institute DOE in Your Company by Davis Balestracci:

DOE works, but I don’t need to sell that to the readers of this newsletter. But as certain as we all are, no one can deny that design of experiments faces resistance even in environments where it is a proven tool. Every research scientist or engineer who has had a major success from DOE can tell you story after story of how management still wanted problems solved one-factor-at-a-time.

Design of Experiments (DoE) was developed by R.A. Fisher in the 1920s (related terms: factorial design, multivariate expertness). Six Sigma was the first general management approach that specifically highlighted the use of Designed Experiments for improvement. Still the use of factorial designed experiments is much less than it could be.

A Brief Overview of DOE from the Macomb Intermediate School District which has a high school course on the topic.

Design of Experiments can seem complicated but at the core it is fairly simple and powerful. By applying the proper techniques it allows you to gage the effect of several variables and, very importantly, the interactions of those variables with a small number of experiments (or tests or pilots).

George Box is a wonderful author (and friend) who can write for mangers who are not knowledgeable about statistics and statisticians. Statistics for Discovery does a good job of explaining how organizations should use experiments to improve.

While the adoption of DoE is still growing slowly, an increasing number of organizations are using DoE to improve. In the past most companies (in most industries anyway) did not have to compete with others that were using DoE to improve. But as more adopt DoE as one more tool to help increase the pace of improvement those that fail to take advantage of this tool will find themselves at a serious disadvantage.

Related links:

4 Responses to “Using Design of Experiments”

  1. Curious Cat Management Improvement Blog » Design of Experiments in Operational Testing
    November 3rd, 2007 @ 11:29 am

    [...] As I have said a number of times it is a powerful and under-utilized tool for improvement. Related: Using Design of Experiments – design of experiments articles – posts on public sector management – Why Use Designed Factorial [...]

  2. CuriousCat: Improvement Through Designed Experiments
    February 4th, 2008 @ 10:11 am

    “Another difficulty in industrial experimentation is the existence of interactions. As has been stated, manufacturing processes are complex with many factors involved. In many processes these factors interact…”

  3. CuriousCat: Printer Product Development Using Design of Experiments
    June 29th, 2008 @ 10:34 pm

    “Kodak researchers use DOE to develop tests that examine first-order, second-order, and multiple factor effects simultaneously with relatively few simulation runs. The result is that the analyst can iterate to a globally optimized design with a far higher level of certainty and in much less time than the traditional approach…”

  4. Curious Cat: Full and Fractional Factorial Test Design
    July 29th, 2008 @ 1:31 pm

    Some good resources for more on the topics discussed above: What Can You Find Out From 8 and 16 Experimental Runs? by George Box…

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