Description: In the article considered basic procedures of planning the decision support systems with using of an adaptive analysis. Proposed a formal determination of the system, its components, input and output information. Introduced the concept of the tree of functional structure which is used to formalize the procedures of an adaptive analysis. Developed the methods for the formation of the tree of functional structure which is a scientific and practical base for improving and subsequent increase of efficiency of planning the decision support systems.
Keywords: system of decision-solutions, data processing system, adaptive analysis, functional subsystems