348 ITU‐T's Technical Reports and Specifications 8. Systems Analysis and Final Design: This involves analysis of the potential merge, deletion or addition of a system module to integrate different systems is to be conducted in this stage. Figure 3 – SSC ICT architecture development methodology 5.6 SSC ICT Architecture interfaces The interface is the median, which stands between the subsystems of one system [14]. There's no particular owner of an interface, neither intersystem contracts exist to describe the interfaces. Most interfaces execute typical batch jobs, while almost all require physical interventions to move generated files between subsystems. In the proposed SSC ICT architecture interfaces play the role to deliver information between discrete SSC ICT subsystems. 6 SSC ICT architecture 6.1 SSC ICT architecture framework 6.1.1 Identification of needs The concept of Smart Sustainable Cities (SSC) has risen from the emerging urbanism phenomenon across the globe, according which the proportion of the international population that will live in cities will exceed 66% in 2050. The previously given SSC definition provides this document with the following characteristics for a smart sustainable city: 1. It concerns an urban space with innovative –not necessarily based on ICT‐ features. However, this document focuses on SSC architecture, where the ICT have a crucial role amongst the other innovative solutions and city facilities. •Needs •Scope •Stakeholders •Architectural requirements •Functional requirements •Views Meta‐architecture •System analysis •Subsystems •Subsystems' interfaces •Dataflow Architecture •Security and Privacy requirements •Quality requirements •Guides for each subsystem Guidelines