Hi there,
I think this is pretty obvious but wanted to be sure.
If there are 5 people on a morning shift and 3 on an afternoon shift, I am basically setting up 8 rotations in the on-call schedules to cover off the times for each of the 8 people seeing they are all on call at the same time 5 rotations for the morning shift (1 per user) then 3 rotations for the afternoon shift (1 per user).
Thanks