A [[workflow]] is a representation of a sequence of tasks, declared as work of a person, of a simple or complex mechanism, of a group of persons,<ref>[http{{Cite web|url=https://www.iso.org/home.html|title=ISO See- e.g.,International ISOOrganization 12052:2006]for Standardization|website=ISO}}</ref> of an organization of staff, or of machines (including IT-systems). A workflow is therefore always located at the elementary process level. The workflow may be seen as any abstraction of real work, segregated into workshare, work split, or other types of ordering. For control purposes, the workflow may be a view of real work under a chosen aspect.