| The Robust Design concept
was pioneered by Genichi
Taguchi, and is embodied in
the Taguchi approach to
Experimental Design.
Taguchi focused on reducing variation in
design. He realized that it is better to
have a product that gives consistently good
results than one that can give better results
but is inconsistent. He expressed this as
the 'robustness' of the design.
Taguchi developed a quantitative model,
the Taguchi
Loss Function, that allowed
the design with the lowest overall cost
to be identified.
Taguchi then developed an approach to designing
products around that achieved the most robust
solution. This design process has three
stages:
- system design: use scientific and engineering
principles to create a prototype
- parameter design: find the settings
for the product and process parameters
to minimize variation
- tolerances: set tolerances on the control
parameters to minimize the loss
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