For one team, the HR lead or team manager gets what each role must be able to do, how many people can do it now, where the team falls short, and the training to arrange first, with who arranges it and by when. Counted by role, never a rating of a named person.
A volunteer lead gets draft shift options once an event's availability replies are in: each role's needs set against who volunteered, the requirements on record and the shifts already confirmed, with every uncovered position shown. The lead checks and confirms; nothing is assigned or sent.