It is convenient that parts can be grouped and treated as one in the main view, but the grouping isn't shown in the select models dialog box that pops up when you edit a process and press the "Select Models" button.
It would have been better if the groups also showed there, so you could quickly select a full group. Sometimes I have a lot of parts on the plate, and they may have similar looking file names, so after having meticulously grouped them in the main view, I really would like to be able to re-use that grouping when selecting models for a process.