Participatory decision making: a step towards e-planning for smart cities by Liliana Ardissono (Dipartimento di Informatica, Universita' di Torino, Italy) and Angioletta Voghera (Department of Urban and Regional Studies and Planning - Politecnico di Torino and Universita' di Torino, Italy) This paper proposes the adoption of ICT technologies related social networks for promoting the Turin Smart City strategy, founded on cohesion, life and territorial quality. This innovation process requires the participation of people in order to define territorial policies, planning goals and projects. The prospective is to use ICT technologies both in support of the information and communication phases of e-governance and to improve the process of citizens' involvement and empowerment, by enabling individual subjects to take part in decision-making and to actively contribute to their own life quality.