The purpose of this paper is three-fold. First, multiobjective decision making is viewed as a philosophy and a process, rather than merely a set of procedures and algorithms; while methodologies are obviously important, the framework within which they are applied, and the communication between analysts and decision makers are the crucial determinants of the success in their application. The second part of the paper is devoted to a brief outline of some methodologies which have been found useful in multiobjective planning and management of water resources systems. Finally, the main thrust of the paper lies in presentation of experience gained in several studies.