**MODELING THE SITUATION OF DEFAULTS ON BASIS OF DIFFERENTIAL CALCULUS IN ENTERPRISE INTEGRATION SYSTEM**

**UDC 681.3**

**DOI:10.26102/2310-6018/2019.26.3.034**

M.L. Lapshina, D.D. Lapshin, A.V. Knyazev, S.V. Pisareva, V.V. Gorbunov

The description of the relatively stable state of the Russian economy over the past two years presents significant difficulties in terms of standard economic theory. The reasons for the permanent, but not landslide decline in production are not clear; it is not clear how several types of money coexist; unusual functions and policies of banks in the absence of investment and low profitability of production.In this paper, we consider the possibility of constructing a simulation model of an enterprise’s activity in an environment where attempts to enter the mar-ket are not always successful and failures are accompanied by serious problems with working capital, an analysis of existing formalized approaches to solving this problem is also given, and an enterprise’s work model is constructed in which sales and purchase of products occurs us-ing a two-channel system, which is characterized by non-payments (the model is stable at the same time) or with full payment (m clothing is unstable). The model takes into account qualita-tively different modes of operation of the enterprise in accordance with external parameters. It is proved that such a model stimulates enterprises to join in financial and industrial groups, the role of fixed costs in the economy and the possibility of their elimination taking into account the proposed mathematical model are also considered. The conducted studies substantiate the idea of the need to create institutions of secondary redistribution of profit.

**Keywords: ** model, enterprise, maximization, defaults, channels.

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