The authors present their methodological recommendations for choosing a software complex to make managerial decisions within a corporation’s activity. They study the system of management in state-owned corporations and give reasons for its improvement by means of implementing IT-decisions. Digitalization is transforming managerial decision making process in corporations in accordance with the speed of decision-making, timely maintenance of production process, ways and forms of information transmission. The authors prove that top-management’s responsibility for a company’s competitive positions in the market is growing fast due to the more intensive implementation of information technology and continuous development of innovative decisions. As state-owned enterprises have a complicated interdependent structure, the system of their management becomes a process which should conform with conceptual basis and principles of transformation of a company’s activity within digital economics. The authors prove that suggested recommendations for using big data technologies, determining and implementing IT-decisions make it possible to increase the efficiency of the management system by means of optimizing business process.