Related Topics:

Mixture Designs

Design Folio Plots

Simplex Designs: Plots

The following plots are available for simplex designs. For information about all the different plots that can be displayed in a design folio, see Design Folio Plots. For general information on working with plots, see Plots.

Effect plots allow you to visually evaluate the effects of factors and factorial interactions on the selected response. 

  1. Note that for mixture designs, main effects cannot be shown in the Pareto Chart - Regression and Effect Probability plots. This is because the T value (or standardized effect) is based on a comparison with 0, which is not appropriate for the coefficients of main effects in mixture designs.

  2. The following effect plots apply only to mixture factors (i.e., components):

If the design includes process factors (i.e., process variables), the following effect plots apply only to them:

Residuals are the differences between the observed response values and the response values predicted by the model at each combination of factor values. Residual plots help to determine the validity of the model for the currently selected response. When applicable, a residual plot allows the user to select the type of residual to be used:

The plots are described next.

* These plots are available only when there is error in the design, indicated by a positive value for sum of squares for Residual in the ANOVA table of the analysis results.

 

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