Selection of the User Needs The User Needs provide a description of the applications and services supported by the European ITS Framework Architecture, and creation of the Functional Viewpoint sub-set begins by selecting those User Needs that define the service(s) to be provided. The User Needs are structured into four levels as follows: * Group (2 - 10) - High level group of services * Service (e.g. 6.1) - Medium level classification of service(s) * Topic (e.g. 6.1.1) - (Part of) an application or service * User Need (e.g. 6.1.1.1) - The individual User Needs themselves Whilst sets of User Needs can be selected by Topic, Service or Group, care should be taken to ensure that all the resulting User Needs thus selected are indeed required. Close