This study seeks to identify the key factors affecting the implementation of a smart sustainable city approach and the extraction of propulsive forces; And illustration of scenarios facing the metropolis of Tehran in different development trends (instability, sustainability and smart sustainability) in order to provide the necessary grounds to justify city managers and policymakers to achieve a smart sustainable city approach. The data required for the research were collected by documentary and field methods. The statistical population included experts related to urban affairs from different scientific disciplines and the sample size was selected by Delphi method to 30 experts. Distribution of questionnaires was also unlikely to be available. Data analysis was performed quantitatively and qualitatively. The studied indicators were compared and measured by determining the current situation and determining the optimal situation for it. In the futures study, the LIPSOR model was used. For this purpose, a questionnaire consisting of the most important key factors, key actors, related boreholes, scenarios designed. The research findings indicate that environmental pollution, global ICT trends, international sanctions, urban population growth, online governance, openness and access to data, natural and environmental resource management, installation of ICT-based sensors and urban planning approach as effective drivers for Realization of a sustainable smart approach in the metropolis of Tehran. Finally, the study of scenarios facing the metropolis of Tehran showed that no optimistic or ideal scenario is predicted.
Keywords: Smart sustainable city, Futures studies, LIPSOR, Tehran
