Hi Dmitry, The points you raise are all good ones, and I agree with them all. I didn't go into much detail about how to decide on the UCG membership, other than a suggestion about PROC SURVEYSELECT. I completely agree that the best approach is to use a table carefully populated with the UCG members. In terms of excluding UCG members from a campaign, Id still argue that a linked cell back to a diagram that has selected everybody from the UCG table is the easiest and most consistent way to apply it across many campaigns, and allows you to control the execution of the query to refresh the cell (or not), in the same way we do for other types of "standard exclusions". But it would also be valid to put a Select Node in each campaign and run the query against the UCG table every time. Cheers James
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