This Recommendation formulates a holistic Smart and Sustainable City impact assessment framework. Specifically@ it covers impact of digital innovation on: 1) Social 2) Economic@ and 3) Environmental aspects of SSC initiatives and projects. Since SSC initiatives impact cities@ it is important to take a broad perspective and assess the impact of these initiatives. International Association for Impact Assessment (IAIA) defines impact assessment as ??the process of identifying the future consequences of a current or proposed action??. Impact assessment can help city administrators as well as their stakeholders understand to what extent their SSC initiatives impact their cities. It can be utilized by: ?C Cities and municipal administrations@ including the SSC-relevant policy-making organizations@ and government sectors@ enabling them to understand the direct and indirect impacts of their SSC initiatives. ?C City residents and non-profit citizen organizations@ enabling them to understand the farreaching consequences of their SSC initiatives and projects. ?C City administrators to determine appropriate trade-off between different options and also for decision making. ?C Private sector organizations to align with SSC initiatives?? intended consequences and impacts and to contribute to them in terms of implementation and/or financing where possible. Impact assessment can be used by city planners as a forward looking tool to evaluate what might happen in the future with respect to their planned initiative(s). It is essential to consider both positive as well as adverse impacts during such an assessment. From its very definition@ it can be seen that impact assessment can be used to balance current and future sustainability of cities with respect to conceived SSC initiatives. Sustainability is often stated as a goal by various entities including city planners; yet it is not easy to measure or assess it. The intention of identifying impact is to be equipped with a well-informed and more holistic perspective of the SSC initiatives and projects. Impact assessment can be used as a high-level tool for city administrators. Impact can be assessed: - for an entire city@ or alternatively for a geographically well-defined subset of it@ - either for the entire set of SSC initiatives (consisting of a large portfolio of city projects) or alternatively it can also be conducted for one or more city projects@ - for all impact types; namely social@ economic and environmental@ or a subset of them. Finally@ impact mitigation measures are included to evaluate impacts for cities.