The study presents a methodological approach, characterized by scalability and replicability, aimed at developing a sustainable territorial strategy, supported by a Collaborative Spatial Decision Support System (CSDSS). The main objective is to elaborate a regeneration process for infrastructure and territorial contexts capable of stimulating situated actions within Inner Italy, where urban revitalisation processes grounded in the concept of community archives could be implemented. The CSDSS is tailored towards a place-based and community-driven strategy for the territory of Atena Lucana, in Southern Italy. It unfolds in three interconnected phases: first, a knowledge phase with a comprehensive understanding of the territory through the integration of various data types; second, an evaluative phase including multi-group analysis supported by the SOCRATES method and multi-criteria analysis employing the integration of QGIS and GeoTopsis methods; third, the data output with the formulation of a suitable strategy for territorial sustainability through collaborative decision-making processes.