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Taguchi Design of Experiments Approach
Taguchi Design of Experiments Approach
Dr. Taguchi was an engineer, not a statistician. He considered the ability of design of experiments (DOE) to identify and reduce sources of variability, yet needed a system that did not require a statistician to implement.
Dr. Taguchi proposed a few considerations for those applying the Taguchi design of experiments approach.
Quality Definition
Rather than the common quality definition related to meets specification, Dr. Taguchi thought of quality in terms of the minimum loss to society. In engineering terms this translates to consistency of performance. A related principle is the minimization of variation.
Consistency means the process or product performance is close to the target. Creating products that are built on target for each dimension and not simply within the tolerance limits for each dimension performs better thus creating less loss to society.
In order to design and build quality, Taguchi suggests a two step process:
- Determine the factor level combination which minimizes performance variability.
- Adjust the factor levels to achieve on target performance.
Standardized and Simpler DOE
In order to introduce practical designed experiments into industry, Dr. Taguchi limited the experimental arrays to orthogonal…
