D.O.E. & ANOVA
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- Should we use a full or fractional factorial design for a preliminary study? If we choose a fractional factorial, should we choose a Resolution III, IV, or V design?
- Based upon what a preliminary study found using a fractional factorial design, should a follow-up investigation use a fold over design? If so, should we fold over on all factors or just one? If just one factor, how should we choose that factor?
- How can we best check for quadratic effects relative to input factors?
- If our full factorial design needs to be confounded, should we use full confounding or partial confounding?
- Is either a Latin square or a Graeco-Latin square design appropriate for our needs?
- When should we combine the capabilities of a nested design with those of a factorial design? How do we go about doing so?
- Now that we’ve chosen a nested design, should we use a staggered one? What are the trade-offs?
- How can we study and interpret interactions to make the process or product under study more robust?
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