Methodology and a Modular Tool for Multiple Criteria Analysis of LP ModelsM.MakowskiauthorThis paper provides an overview of the methodology of the multiple-criteria model analysis for decision support. In particular, different approaches to the analysis of a model using multiple-objective optimization are compared. One of the most successful methods, namely aspiration-reservation led decision support, is presented in more detail. The implementation of a Decision Support System (DSS) has to be problem specific but reusable modular software provides substantial help in actual implementations. A DSS for regional water quality management serves as an illustration of the application of modular software tools. This paper presents one of such software tools, called LP-MULTI, especially designed and implemented to be helpful for the analysis of multiobjective problems described by linear models. The paper discusses the methodology applied to LP-MULTI and provides the necessary details of the implementation.1994-12WP-94-102Monograph