Arann is 5 on 5 off, with one week of 4 off in between and the next week 4 on, 5off. Made up of 2 days 3 nights or 3 days 2 nights. Brilliant roster pattern, 2 weekends a month off, with you working the 3rd on nights and doing the 4th on days. This is the best ops roster pattern! Good for time off and leave etc. Much better than 4 on 4 off. With our roster pattern, you only need put 5 shifts leave in and get 15 off!