Alice’s Restaurant in Hometown, Ind., makes the best pancakes and tenderloins this side of heaven. It also employs 150 workers; some full-time, some part-time.
Suppose Alice, for whatever reason, announces she is going to let go an equivalent of two full-time workers. The sacking could take a number of forms: she could let two full-timers go, she could let four part-time workers go, she could reduce four full-timers to part-time ... you get the picture.
Now let us change the story slightly. In this case, suppose an equivalent of two full-time workers give notice they are leaving. Again, this can take a number of forms: two full-timers quit, four full-timers reduce to part-timers.