A multi-user complex problems resolution system, in various instances an urban design complex problem resolution system, comprising a plurality of interconnected user devices, each device embedding a model data structure comprising a representation of a physical system, the system being provided with at least one module connected to the devices, the module carrying out the steps of receiving data and metadata modifying variables, from all the devices; detecting an input pattern based on the data and metadata received from all the devices; dynamically generating a customized data structure based on the input pattern; updating the model data structure of the devices with the customized data structure. Also, a corresponding computer-implemented method.