What is Robust Design?

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Robust Design is a technique by which you can optimize a product so that its behavior is not only improved, but more predictable. In DesignXplorer, the product behavior is expressed using the response parameters you choose. For example, in a finite model, you might use the maximum stress or maximum deflection to decide whether the product behavior is acceptable.

Robust Design is based on assumptions regarding scatter, or uncontrollable uncertainties. Scatter in the input parameters that affect the response parameters will cause the response parameters to also be uncertain and therefore less predictable. Robust Design is based on the result parameters of a Six Sigma Analysis. Therefore, before you run a Robust Design analysis, you must first parameterize the results of a Six Sigma Analysis. To understand which Six Sigma Analysis parameters should be parameterized, look at how robustness can be defined and measured.