Sketch schedule. In the case of the first hospital, the clerk has a constructive procedure:
she uses the initial schedule and adds shifts in order to maximize the quota requirements.
When all mandatory shifts are added, she will then try to improve the schedule one week at a
time using a flip movement.
She will move one shift assignment from one day to another in the general case, and from a shift to another in the case of nurses under the rota system.
The second clerk has an improving procedure: she moves from a completed schedule to another that best satisfies her requirements using the same flip movement.
The Figure 3 below illustrates this move.