Final answer:
The term related to the number of personnel an individual can effectively supervise is 'Span of control'. In the context of bureaucracies, 'Coercion to join' is not a characteristic of such organizations, which are typically defined by a hierarchy of authority, explicit rules, and a division of labor.
Step-by-step explanation:
The term that relates to the number of personnel an individual can effectively supervise is B. Span of control. The span of control is a key concept in management and organizational structure. It refers to the number of subordinates that a manager or supervisor can directly control. This number varies with different organizations, the nature of the work, and the style of management. A wide span of control means a single manager supervises a large number of subordinates, while a narrow span of control means they oversee fewer people. Bureaucracies, as efficient systems for managing large groups, often rely on a well-defined hierarchy of authority and a clear span of control at each level.
When reviewing the characteristics of bureaucracies, coercion to join is not a characteristic of bureaucracies. Therefore, the correct answer to the question which of the following is not a characteristic of bureaucracies is a. Coercion to join. The other options listed, such as hierarchy of authority, explicit rules, and division of labor, are indeed typical characteristics of bureaucratic organizations.