organisational charts: a diagram illustrating the roles and relationships within an organisation.
Hierarchy: is a highly structured pattern of offices and post involving a number of layers or command.
Organisation level: a posts involving similar levels of power and authority.
Span of control: the number of people that a person manages or supervises directly
Organisation: a system having an established structure in which people work and deal with one another in a co-ordinated and co-operative way to meet certain objectives.
Flat organisation: an organisation with relatively few layers between the top and bottom.
Tall organisation: an organisation with many different levels in a hierarchy.