A pattern of work in which the starting time of successive rostered shifts, or blocks of rostered shifts, changes in both a clockwise and an anticlockwise direction.
- Within a block of shifts. Two Morning shifts followed by two Night shifts and then two Afternoon shifts.
- Across blocks of shifts. A block of six Morning shifts is followed by a block of six Night shifts and then six Afternoon shifts. (Effectively the same pattern of work as with a Backward rotation).