Was (wer) ist hierarchy - definition
![Maslow's hierarchy of human needs]]. This is an example of a hierarchy visualized with a triangle diagram. The hierarchical aspect represented here is that needs at lower levels of the pyramid are considered more basic and must be fulfilled before higher ones are met.](https://commons.wikimedia.org/wiki/Special:FilePath/Maslow's hierarchy of needs.png?width=200 "Maslow's hierarchy of human needs]]. This is an example of a hierarchy visualized with a triangle diagram. The hierarchical aspect represented here is that needs at lower levels of the pyramid are considered more basic and must be fulfilled before higher ones are met.")
![tree]]. Diagrams like this exemplify [[organizational chart]]s.](https://commons.wikimedia.org/wiki/Special:FilePath/Organizational chart.svg?width=200 "tree]]. Diagrams like this exemplify [[organizational chart]]s.")
![sets]], the resulting ordering is a ''nested hierarchy''.](https://commons.wikimedia.org/wiki/Special:FilePath/Russian-Matroshka no bg.jpg?width=200 "sets]], the resulting ordering is a ''nested hierarchy''.")
Wikipedia
A hierarchy (from Greek: ἱεραρχία, hierarkhia, 'rule of a high priest', from hierarkhes, 'president of sacred rites') is an arrangement of items (objects, names, values, categories, etc.) 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 (especially political science).
A hierarchy can link entities either directly or indirectly, and either vertically or diagonally. The only direct links in a hierarchy, insofar as they are hierarchical, are to one's immediate superior or to one of one's subordinates, although a system that is largely hierarchical can also incorporate alternative hierarchies. Hierarchical links can extend "vertically" upwards or downwards via multiple links in the same direction, following a path. All parts of the hierarchy that are not linked vertically to one another nevertheless can be "horizontally" linked through a path by traveling up the hierarchy to find a common direct or indirect superior, and then down again. This is akin to two co-workers or colleagues; each reports to a common superior, but they have the same relative amount of authority. Organizational forms exist that are both alternative and complementary to hierarchy. Heterarchy is one such form.
