The document discusses span of management, which refers to the number of direct reports a manager can effectively oversee. It states that too many subordinates cannot be supervised effectively by a single manager. The optimal span depends on factors like leadership skills, subordinate skills, time available, work type, supervision level, and delegation of authority. The document also describes three types of relationships in management: direct single relationships between each subordinate and manager; direct group relationships where the manager interacts with the team; and cross relationships between subordinates.