A hierarchy chart depicts the elements of a system, organization, or concept from the highest to the lowest position. The connecting lines explain how they are related to one another. It is employed in both the fields of education and business. A chain of command The chart categorizes information by beginning with broad categories and progressing to more detailed levels. The hierarchy can be presented in either a vertical or horizontal format, and it can contain as many levels of information as needed. A hierarchy is defined as a group of people or things arranged in order of rank or the people who rank at the top of such a system.