The mDSS software is a generic indicator-based Decision Support System (DSS) developed to assist decision makers in the participatory management of environmental problems by applying several Multi-Criteria Analysis Methods and Group Decision Making. Specifically, it supports Decision/Policy Makers in instances where there are choices to be made between alternative options for environmental management with the involvement of multiple actors. Based on the DPSIR conceptual framework (Driving forces-Pressures-State-Impact-Response), the methodology facilitates the integration of environmental, social and economic concerns to express preferences in terms of options sustainability with consideration of alternative exogenous scenarios drivers.