The supervisor will have to hunt those responsible for the shift. It must make a vacation for 3 days unless sick / emergency. You can call that accountability chief at that time.
To leave with the Supervisor who is responsible for that shift to make it 3 times the day before vacation, except in case of emergency/sick leave. Can call to come out head is responsible for it.
You must be a good-bye, and the responsibility of a Supervisor that will have to do it, and stop before 3 days sick leave except for the case/Emergency Calls can be said to be responsible for the chief of the day.