The key point of flow process modeling is that it is based on the use of discrete models. In traditional approaches to modeling production processes, time is considered as a continuous quantity. Static models are far from reality, since any production has a cyclical nature, since any product is produced in a finite time. In the modern theory and practice of modeling, mathematical models of economic processes in which time changes discretely are of great importance. The work combines various aspects of management, found a common language and structure in describing various conditions in production, the supply of components, raw materials, materials, as well as research, based on investments in staff training and product quality. The key point of flow process modeling is that it is based on the use of discrete models. In traditional approaches to modeling production processes, time is considered as a continuous quantity. Static models are far from reality, since any production has a cyclical nature, since any product is produced in a finite time. In the modern theory and practice of modeling, mathematical models of economic processes in which time changes discretely are of great importance. The work combines various aspects of management, found a common language and structure in describing various conditions in production, the supply of components, raw materials, materials, as well as research, based on investments in staff training and product quality. This article discusses the actual problems of the formation of flows that characterize the financial results of the company's activities for the production of launch vehicles. It is shown that the main flow parameters characterizing the financial condition of the enterprise are the cash flow to be paid and the cash flow to receive incoming funds for the sale of rocket kits, each of these flows is represented by a discrete simulation equation, the solution of which is carried out using computer models. An equation has been formed to determine the cash flow for the payment of wages to the main production personnel at the enterprise. To assess the magnitude of the effect as the final result of the company's activities, an equation has been formed that allows determining the specific cost of the launch vehicle. At a known price and its unit cost, mathematical and computer models of the profit flow received by the enterprise are formed. The graphs of the trajectories of changes in the flow of profit and the expenditure on wages presented in the work allow us to determine the time of the transition process and its dynamic stability under imposed disturbances in the volume of the order from Roscosmos.