By 2030, Finland aims to become the world's most functional testbed and innovation environment, recognized as a leader in technological development, innovative procurement, and a culture of experimentation. This goal is supported by the innovation ecosystem agreement between the state and the city of Tampere for 2021-2027. With the help of the Smart City for Citizens development program, the city of Tampere has identified three key focus areas for future smart city development: the data economy, citiverse, and digital twins. The city of Tampere has prepared an ERDF project aimed at improving the public sector's ability to utilize digital twins for developing smart innovations and digital product and service solutions for the benefit of citizens and local businesses. The project focuses particularly on understanding the current state of digital twins, identifying data sources and improving their usability, implementing pilots for new digital twins, and building a network to support development. The project will identify data sources and existing digital twins that support smart product and service innovations, as well as create new digital twins for selected service areas. The project will implement technology pilots utilizing digital twins to promote the digitalization of city services and enhance the capacity for generating smart product and service innovations. Simultaneously, the city of Tampere will, in accordance with EU recommendations, build a comprehensive architecture and city data model to enable the integration and shared use of multiple digital twins. This aims to accelerate new innovations and increase impact. The project is divided into four work packages. In Work Package 1, the current state of the city’s information and data sources across various service areas will be identified, and a description of the key information infrastructure for smart innovations will be created. A visual representation of the existing data and identified digital twins will be produced for future use. In Work Package 2, in collaboration with city service experts and ecosystem companies, 2-4 service areas will be selected for which new digital twins or data infrastructure enabling digital twins will be developed. The implementation will primarily utilize existing data sources, but new ones may be created if necessary. The definition of service areas will be guided by the themes of the ecosystem agreement, such as sustainable urban development and digital health and well-being. In Work Package 3, interesting challenges will be identified from different service areas, and 2-6 AI or data pilots will be carried out, combining different information and data sources. The pilots can utilize AI-based recommendation and matching logic, analytics, or predictions. The goal is to combine data sources to create new solutions that cannot be produced based on a single data or information source. The definition and implementation of the data pilots will consider the themes of the ecosystem agreement, such as sustainable urban development and digital health and well-being. In Work Package 4, systematic involvement of service target groups, city employees, ecosystem actors, and external experts, such as companies and researchers, will be carried out. Participation will be achieved by developing modern and efficient methods combining digital channels and face-to-face interactions. The work package will develop and strengthen a systematic operating model and suitable participation tools. The aim is to gain diverse perspectives, customer experiences, expertise, and research-based knowledge to support development work. This work package will be implemented throughout the project. The project's main outcomes are: - New use cases for digital twins and increased data utilization - Increased knowledge in the ecosystem related to the use of digital twins - Enhanced collaboration and systematic participation between the city of Tampere, local companies, customers, and ecosystem actors - New activities created and public sector functions improved through the use of digital twins - A stronger international profile for the city of Tampere as a leader in digital twin utilization. The city of Tampere is the sole implementer of the project.