The relevance of the research is determined by the need to develop the mathematical toolkit for designing investment, innovative and complex projects in which technological, productive, and incremental and breakthrough innovations are implemented in manufacturing technological systems of production enterprises. Innovation activity of production enterprise should be realized in the "think-makethink" mode; therefore in conditions of digital economy each implemented innovation should be placed in a digital information analytic system of the enterprise management accounting. The aim of this research is to develop the toolkit regulating the sequence and validity of making management decisions. As the model of a manufacturing cycle we take the closed operation cycle converting manufacturing capital of the manufacturing-technological system in an enterprise into monetary capital in the form of manufactured and sold products having market added value. As a result of the study we developed the graphical analytic toolkit in the form of the plot of monetary flows vectors. This study allowed us to create a digital platform of an innovation activity in engineering business. Further research will be devoted to the development of entropy method of analysis and design of innovative projects in engineering enterprises.
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