Abstract. An approach to development of software and mathematics that allows to solve the problem of synthesizing an integrated plan for modernization of an information system and for a complex object functioning is developed. A model of production processes and a management model of information services modernization are presented. A software prototype is described that synthesizes the optimal integrated plan based on the Boltyansky local section method. The developed software package makes it possible to rationally approach the choice of the initial dispatch plan and find compromise solutions in the presence of many possible options for modernizing integrated information systems. Results of experiments are presented.

Keywords: modernization planning, complex modernization, optimization of modernization process, complex planning of modernization

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