Making political choices and corporate decisions converge to sustainable development requires a pragmatic approach to assess sustainability, based on good science and adequate information. The process of sustainable technological development requires making of decisions, selecting from among several possible development paths the one with the most perceived benefits. For the development to be sustainable, all the decisions directing its path should be made with sustainability in mind. To help this process we suggest the development of the pragmatic set of sustainable decision making aids using Bellagio Principles as the principle guidelines for undertaking and improving assessment of progress toward sustainable development. The Bellagio Principles that are especially pivotal to our project are holistic perspective (our DSSs will simultaneously take into account technical, financial economic, environmental, social, regulatory, and other sustainability indicators), practical focus (nine concrete software systems will be development), openness (both development platform and resulting software will be open source), broad participation (possible stakeholders are scientists, technologist, policy makers, investors, managers, site owners, etc.) and ongoing assessment.