A supervisor, or lead, is the job title of a lower-level management position that is primarily based on authority over workers or a workplace. A supervisor can also be one of the most senior on the staff at the place of work, such as a professor who oversees a Ph.D. dissertation. Supervision, on the other hand, can be performed by people without this formal title, for example by parents. The term supervisor itself can be used to refer to any personnel who have this task as part of their job description.
A 1940s poster from the United States
A hierarchy is an arrangement of items that are represented as being "above", "below", or "at the same level as" one another. Hierarchy is an important concept in a wide variety of fields, such as architecture, philosophy, design, mathematics, computer science, organizational theory, systems theory, systematic biology, and the social sciences.
Matryoshka dolls, also known as nesting dolls or Russian dolls. Each doll is encompassed inside another until the smallest one is reached. This is the concept of nesting. When the concept is applied to sets, the resulting ordering is a nested hierarchy.
Career-oriented purposes can be diagrammed using a hierarchy describing how less important actions support a larger goal.
