We propose a generic software tool supporting participatory decision processes based on simulation of scenarios. The main objective of the tool is to provide information about the state of the participatory process, by enhancing the current consensus and conflicts. The tool provides a generic interface, which is connected to a database of model results. The user can visualise the results corresponding to the scenarios for different attributes of objects located in the space, and a variety of indicators related to these variables. The user expresses evaluations of scenarios by specifying thresholds of acceptance of objects attribute values. The software provides then indicators of comparisons between the expressed evaluations, highlighting the differences of similarities between the expressed evaluation. A series of tests with a group of potential users is currently in progress.