The diagram or chart that shows how a company or business is organized is called a/an?

The term "organization chart" refers to a visual representation of the structure of a company, detailing the relationships and relative ranks of its parts and positions/jobs. This chart typically illustrates various roles within the organization, showing who reports to whom, and may also highlight departments and teams. An organization chart is critical for understanding the hierarchy, facilitating communication, and assisting with workflow management within a business.

While "org chart" is a colloquial abbreviation for organization chart, the full term is more precise and commonly used in professional contexts. The other terms, such as "map" and "flow chart," do not convey the same meaning; a map generally refers to geographical representation, while a flow chart is used to illustrate processes or workflows, rather than organizational structure. Thus, organization chart is the most accurate choice for describing a company's organizational layout.