Noise factors (robust process engineering) enables you to produce acceptable products reliably, despite variation in the process variables. Even when your experiment has controllable factors, there is a certain amount of uncontrollable variation in the factors that affects the response. This is called transmitted variation. Factors with this variation are called noise factors. You cannot control some factors, like environmental noise factors. The mean for some factors can be controlled, but their standard deviation is uncontrollable. This is often the case for intermediate factors that are output from a different process or manufacturing step.
Save the model to the data table with the Save > Prediction Formula command.
Launch the Profiler (from the Graph menu).
Assign the prediction formula to the Y, Prediction Formula role and the noise factors to the Noise Factor role.
Select Maximize Desirability from the Profiler menu.