The mechanisms of interaction of flows and stocks at enterprise from the perspective of logistics

Purpose. To study and compare the flows and stocks as logistics categories, as well as to analyze the mechanisms of interaction of flows and stocks in a modern enterprise from the perspective of logistic approach. Methods. The research is based on the analysis of literature sources, mathematical modeling and the general scientific theoretical methods: analysis and synthesis, abstracting, formalization, induction, and dialectical approaches. Results. The definitions of material flow and the stock of materials in logistics have been studied. The comparative analysis of their similarities and differences has been carried out. The mathematical model of interactions of flows and stocks in an enterprise has been demonstrated, based on which the law of 'conservation of material resources" has been deduced, according to which the volume of material resources in the closed system is constant, and only the correlation between total volume of stocks and total intensity of flows changes. Much attention is given to the transitional moments of stocks transformation into flows and vice-versa. The conclusions of the article summarize the quantitative rules of interaction of flows and stocks in a modern enterprise. Scientific novelty. The author proves that not only the "flow", but "flow" and "stock" together should be emphasized as the main category of logistics. The high importance and specific character of the transitional moments of transformation of stocks into flows and vice-versa in a modern industrial enterprise are proved. The key principles that describe the interrelations between quantitative parameters of flows and stocks are formulated.