4. Our advice
4.1 Build a robust workgroup
The more varied your workgroup is, and the more regularly it includes people working on the process to be tested, the lower the risk of missing out on influential factors!
SCROLL TO TOP4.2 Limit levels per factor to the strict minimum
Keep to levels that will have a real impact, as the two extremes of a parameter (without it being zero) are often appropriate.
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References
Statistical Method for Research Workers , Ronald Aylmer FISHER, 1925
Statistical methods for scientific research , Ronald Aylmer FISHER, 1946
Taguchi's quality engineering handbook, Genichi Taguchi, Subir Chowdhury, Yuin Wu, John WILEY, 2005
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