Select the graph options for Power and Sample Size for Plackett-Burman Design

Stat > Power and Sample Size > Plackett-Burman Design > Graph
Display power curve
Create a plot that shows the power of the test versus the effect size, with a curve for each combination of replicates and number of center points. Use this plot to compare different designs.
Generate additional power curves based on
Enter numbers of replicates and numbers of center points to display power curves for combinations of values that you did not include on the main dialog box.