MSc. student Flaminia Squitieri, with the collaboration of Dr. Maria Reyes (Wageningen University) and the Italian team from the University of Bologna, Dr. Elena Toth and Dr. Matia Neri, carried out the first workshop in the case study of Rimini. Eight of the nine-selected stakeholders attended the workshop on Monday 12th April 2021. The workshop lasted around twwo hours and a half, and was a good opportunity for all stakeholders to meet. During this meeting, all stakeholders had the opportunity to present their own conceptual maps, which were developed on the the interviews carried out online also by Flaminia, and polished afterwards with the feedback of each stakeholder. Also, Flaminia presented all the work done behind the maps, and the main interest topics that were identified in common for all stakeholders. Each stakeholder chose what they believe is the most important interest topic and defended it. Afterwards, a votation took place to rank these interest topics, and finally, based on this ranking, each stakeholder could express their satisfaction towards this ranking. Fortunately 6 of the 8 participants felt comfortable with this prioritization, which allow us to focus on certain topics at the moment of developing the Agent -Based Model (ABM) for Rimini water supply system.