Increasing concerns about model management system, which is one of the major components of DSS, lead to studies of user friendliness ad model executions. This thesis presents Object-Oriented Model Management Support System (DOMS) based on the Object-Oriented Concepts which made it possible to represent models as object``s method. The view of model as object``s method has several merits. First, it can represent model``s operation and enables general decision makers to identify and select more appropriate models than the view of model as data. This capability also reduces the semantic gap between decision maker and model builder. Second, this view enables DOMS to execute models by the way of automatic Ada code generation and specific LP formulation for LINDO. According to the Object-Oriented Concepts, considerations for managing multiple solvers and case base concept was also introduced. A prototype DOMS is implemented in Pascal.