Final answer:
The organizational chart primarily indicates the relationship among positions and functions within a food service department by providing a visual diagram of the hierarchy and roles.
Step-by-step explanation:
The relationship among positions and functions within a food service department are indicated primarily by the organizational chart. An organizational chart is a visual representation that shows the structure of an organization and the relationships and relative ranks of its parts and positions/jobs. Unlike a job description which outlines the duties specific to a job, the mission statement which gives the organization's purpose, or the policy statement which outlines the organization's rules and guidelines, the organizational chart clearly delineates the hierarchy and how different roles relate to one another within the department.