The integrated information/decision support system presented inthis paper is aimed at offering the users (e.g., government or municipalagencies, promoters, etc.) a flexible and user-friendly environmentbased on formal multiple criteria methodologies to assist them inkeeping and structuring information, obtaining historical and statisticalanalysis, and providing decision aid by enabling a detailed comparativeanalysis of the alternatives in urban plans evaluation, both forexperts and other people with no technical knowledge.