Urban system (city as a system)
A complex and structured urban environment or system composed of highly diverse,
interacting, and interdependent parts and activities aggregated or organized in such a way
as to serve a common purpose and/or satisfy the needs and wants of people residing in and
dependent upon that system.
Useable area
Rentable area, less certain common areas that are shared by all tenants of the office
building (such as corridors, storage facilities, and bathrooms). Also defined in office
buildings as the area that is available for the exclusive use of the tenant. Useable area =
rentable area × building efficiency percentage.
User criteria
In reference to the identification and classification of properties and the evaluation of
feasibility characteristics of various locations/sites in accordance with the specific needs of
the user as defined by its business requirements, and the use and zoning restrictions in any
given jurisdiction or municipality.