Figure 1
From: Application of Quantum Annealing to Nurse Scheduling Problem

Graphical examples of the computed shift schedules for the case of \(N=3\) nurses for \(D=4\) days. A black square indicates that a nurse is scheduled to work. The horizontal axes labels the days and the vertical axes labels the nurses. The left figure represents a schedule that satisfies all the constraints, while the right figure represents a schedule that fails to satisfy the soft nurse constraint of every nurse being assigned some days of work.