See my #21
Are you covering 24/7/365? We have five shifts, our week hours are 32, 36, 48, 36, 48. One shift is always on days, one is always on nights. One shift is on “relief week”, which is the week with four eight hour days. If another shift was on vacation the relief shift would cover. Most take their relief week as vacation which means you can be off for 14 days straight with 32hrs vacation.