Hierarchy Concept
In general, hierarchy concept designates a way of organization of several elements of a certain system, in which each one of them is dependant of the element that is immediately above (except, obviously the first that is not dependant of any others).
The hierarchy concept is also widely applied to the management of organizations to designate a command chain that begins in the top managers and follows until the non manager employees, successively passing through all levels of the organizational structure. Is, so, through the hierarchy that are established the formal authority relations among superiors and subordinates and is defined the organizational structures in any organization.