826 ITU‐T's Technical Reports and Specifications 5 Analysis of key performance indicators systems This section provides an analysis of nineteen different sets of index systems and KPIs related to the use of ICTs and sustainability in cities. As demonstrated in the Technical Specifications on “Overview of key performance indicators in smart sustainable cities”, the identification of these indicators is vital to assess how the use of ICTs can have an impact on the sustainability of cities, in order to provide grounds for standardization. Box 1 highlights some of the stakeholders and the benefits associated to the development of KPIs for SSC. The analysis in this Technical Report is conducted through a comparison based on the key dimensions and sub‐dimensions that characterize smart sustainable cities, namely: SSC dimension No. of indicators/sub‐dimensions ICT 14 indicators / cover network facilities and information facilities Environmental sustainability 14 indicators / cover environment and energy and natural resources Productivity 12 indicators / cover innovation and economic sustainability Quality of life 22 indicators / cover convenience and comfort, security and safety, health care, and education and training Equity and social inclusion 11 indicators / cover openness and public participation, social sustainability, and governance sustainability Physical infrastructure 15 indicators / cover building, transport, sanitation, and municipal pipe network These different dimensions and sub‐dimensions are developed in further detail in the Technical Reports and Technical Specifications that are part of the FG‐SSC KPI series (i.e. \"Overview of key Box. 1: Benefits of SSC KPI development For city dwellers and non‐profit citizen organizations, by enabling them to understand the development and progress of SSC with respect to ICT's impact. For the development and operation of SSC organizations, including planning units, service providers, operation and maintenance organizations, among others, by helping them to fulfil the tasks of sharing information related to the use of ICTs and their impact on the sustainability of cities. For evaluation and ranking agencies, including academia, by supporting them in the selection of relevant KPIs for assessing the contribution from ICT in the development of SSC.