Which of the following principles suggests that an employee should have only one direct supervisor?

The principle that suggests an employee should have only one direct supervisor is known as unity of command. This concept is fundamental in organizational theory, as it helps to maintain clear lines of authority and responsibility within a company. When an employee reports to a single supervisor, it reduces confusion and conflict that can arise from receiving instructions or direction from multiple superiors. This principle facilitates accountability, as it is clear who is responsible for the employee's work and performance, thereby enhancing organizational efficiency and effectiveness.

In contrast, while authority relates to the legitimate power an individual has to make decisions and command others, it does not specifically address the number of supervisors an employee should have. Division of labor pertains to the allocation of specific tasks and duties among employees to enhance productivity, and while it is important for specialization, it does not influence the hierarchy of command. Scalar chain represents the line of authority in an organization, which is important for understanding the flow of command, but it does not specifically dictate that one employee must have only one supervisor, as it often allows for varying levels of authority and multiple interactions across different levels of management. Unity of command is crucial for effective management and communication within any organization.