Which principle relating to the assignment of functions is NOT correct in department reorganization?

C is the correct choice because the principle that there should be no disturbance of the previously assigned tasks of personnel does not align with the goals of department reorganization. When an organization undergoes reorganization, it often necessitates changes to roles, responsibilities, and tasks to improve efficiency, adapt to new strategies, or respond to external pressures. Allowing previous assignments to remain untouched can hinder the potential benefits of the reorganization and prevent the organization from evolving in response to its needs.

In contrast, the other principles outlined—such as separating line and staff functions, assigning separate functions to distinct units, and minimizing overlapping among organizational elements—are standard practices in effective organizational design. These principles aim to create clarity in reporting structures and responsibilities, improve communication, and enhance organizational efficiency by ensuring that everyone’s roles are clearly defined and aligned with the organization’s goals.