The Simulationsmodell Nachhaltigkeit (SimoNa) initiative, launched by the canton of Basel-Stadt, aims to provide a comprehensive simulation model to understand how Basel-Stadt will develop in the future and how current decisions will shape it, with a focus on sustainability. At the time, SimoNa is in an early conceptual phase. Its vision and mission are defined, but its concrete goals, requirements, and scope have not yet been fully and systematically captured. This situation required a structured approach to gather and organize stakeholder input as a foundation for further development.

At first, a literature review identified relevant requirements engineering frameworks, techniques, and standards. Subsequently, a hybrid methodology, which, among others, combines selected GORE principles, elements from the Volere template, and sections of the ISO 29148 standard, was developed. Five semi-structured interviews with key stakeholders were conducted, documented, and analyzed. Stakeholder goals were consolidated, refined into sub-goals, and transformed into preliminary requirements with a focus on traceability. Based on these insights, recommendations for SimoNa were formulated.

Through the application of the developed methodology, this thesis documented 14 parent goals, of which 8 were decomposed into 17 sub-goals and 40 traceable preliminary requirements according to GORE principles. Each requirement is directly linked to stakeholder input, with documented justifications for its decomposition. The derived requirements were validated against selected ISO 29148 quality characteristics. Based on insights from the interviews and the analysis of said inputs, a set of practical recommendations was formulated. These include clarifying and concretizing SimoNa’s vision and scope, focusing on a spatially and thematically limited pilot project, ensuring modularity and integration into the existing technical landscape of Basel, embedding governance into established decision-making processes, and prioritizing usability through early testing as well as transparent data management processes. The outcomes of this thesis provide the client with a transparent and evidence-based basis for further exploration of goals and concerns, refinement and prioritization of requirements, stakeholder alignment, and aid in the development of SimoNa from concept to concrete solution.