Consider the wine tasting experiment described in Example of a Custom Design in Custom Designs. Wine samples are tasted by five raters (Rater) and each rater tastes eight samples.
1.
Select Help > Sample Data Library and open Design Experiment/Wine Data.jmp.
2.
Click the asterisk next to Rater in the columns panel and select Design Role.
3.
Click Cancel.
4.
Click the asterisk next to Rater in the columns panel and select RunsPerBlock.
RunsPerBlock Column Property Panel for Rater

Help created on 9/19/2017