How are excluded rows handled by individual measurements and moving range control charts?
In JMP Versions 6.0, 6.0.1, and 6.0.2 when rows are marked to be excluded in a JMP data set, the excluded rows are still used in the computation of moving ranges for individual measurements and moving range charts (IR charts) in the Control Chart dialog. This is consistent with SAS, which provides the Exclude functionality for control charts via the data set switch variables _COMP_ and _COMP2_. _COMP_ and _COMP2_ are equal to Y (Yes) for every row by default in SAS, meaning that every row is used in primary and secondary chart computations. Setting _COMP_=N for rows in the data set excludes subgroups from the computation of parameters and control limits in the primary chart. _COMP2_ works the same for secondary charts (MR, R and S). The important part is that this affects parameters and control limits, and moving ranges are not considered parameters. The process mean and standard deviation are parameters. So in SAS IR charts, if you exclude samples via _COMP_ and _COMP2_ then they are
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