eng 2024 Abstract: This paper presents research on citizen-centered services smart services from the perspective of a project partially supported by Ministry of Education, Science and Technological Development of the Republic of Serbia under Grant No. III44007. Ini- tially intended to E-Government services in social, economical and biological domains it is naturally extended to smart city services due to the common goals in terms of citizen-centered services, common data sources, similar technologies, and the like. It is also overlapped with some international cooperation with similar goals. Both, E-Government and Smart Cities, feed with information which originate from their sensors, citizens and IoT, and, on return, provide smart services that aims to im- prove the quality of life and achieve more efficient management in the different envi- ronments in which they operate. The sensing is provided by listening citizen opinions via social media, like Facebook, X (formerly, Twitter), and the like, and other Web 2.0 methods like crowdsensing and crowdsourcing, etc., on the one hand. On the other hand, the emerging world of IoT allows to sense some phenomena in an environment like temperature, air pollutants, traffic congestion, fire, flooding, etc. Development and deployment citizen-centered services is analysed through the prism of four dimensions, namely (1) modeling and decision making, (2) sensing and analysing, (3) willingness and engagement, and (4) openness and transparency. In ad- dition, key technological enablers that drive the full achievement of these dimensions are briefly discussed. To address the challenges we faced, we had to contend with sev- eral issues. These include the enormous amount of data with high velocity, value and variety, the complexity of Serbian language and grammar with the absence of lexical resources, and the limitations of IoT resources, just to mention a few. These challenges are discussed by related work and brief overview of proposed so- lutions with special emphasizes on a framework, design of several specialized social machines, text processing in Serbian language, sentiment analysis, business process management and an excerpt of developed and deployed services. Alongside with pub- lished work and its main contribution key mathematical foundations and technologies used, are briefly presented. Finally, some open issues and research agenda are given. This paper is written in the memory of late Prof. Cemal Doli ́canin who lead III44007 ́ project. Towards Citizen-Centered Smart Services Research Insights from a Project https://phaidrabg.bg.ac.rs/o:35319 ISBN: 978-86-81506-30-1 application/pdf 1567689 bytes 8th International Conference „Contemporary Problems of Mathematics, Mechanics and Informatics“ CPMMI 2024 startpage: 56 endpage: 56 All rights reserved Keywords: open government, smart cities, social machines Kajan, Ejub Ugljanin, Emir Marovac, Ulfeta Avdić, Aldina Ljajić, Adela info:eu-repo/semantics/conferenceProceedings