The relevance of studying the models of diversified inventory management is caused, firstly, by the complexity and diversity of management process, and, secondly, by a large proportion of logistical costs in overall enterprise costs. The primary value of inventory management models is to increase the qualitative level of meeting various kinds of needs by material resources and improving the reliability of economic system performance. The article considers the process of modelling the system of diversified inventory management. A Special attention is paid to the mathematical forecasting model of implementing, determining the reorder level and order quantity. A feature of the present model is that it involves only the logic of the process, since the variety of control algorithms modifications may cause certain difficulties of creating a universal model. In the given model, a controllable parameter is the time required to dispose of the remainder of stock, which enables us to take into account, firstly, the forecast demand for resources, and, secondly, the restrictions on the production capacity.

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Purpose: The aim of this study is to examine acceptable methods for choosing directions for increasing the sustainability of supply chains in construction. The  study  also determinate   the  factors  affecting the sustainability of supply chains in construction   Theoretical framework: Supply chain integration in many industries is based on integrated enterprise resource and relationship processing systems (ERP), but the construction industry has traditionally lagged behind in these processes. The need to create effective relationships in supply chains and increase the resilience of supply chains in construction has become evident in the context of the pandemic. However, the weak formalization of these processes in construction has led to the need to find acceptable methods for choosing directions for increasing the sustainability of supply chains in this industry.   Methodology: This is a  descriptive-based  study.  Approaches to factors of the supply chain stability were researched and systemized and from this the situations for the increasing stability of the supply chains are determinated. The choice of a model of the increasing stability of the supply chains was determined by the analytic hierarchy process.  Hierarchy analysis was used as a method for selecting a scenario for increasing the sustainability of supply chains in construction.   Findings: The results of the research carried out to conduct a multi-criteria choice using the opinions of experts in the construction industry. The choice of scenarios for increasing sustainability is due to the fact that the introduction of adaptive information technologies allows to take into account all groups of selected factors, while ensuring synchronization of production planning, product shipment and inventory management, increasing market feedback, ensuring that production volumes correspond to product demand, as well as reducing logistics costs and the price of products for the end customer.   Research, Practical  &  Social  Implication: The  study  contributes  to  a  better understanding crucial factors of the sustainability of supply chains in construction. The processes  of  analyzing   and evaluating   factors contribute  to improving  the sustainability of supply chains in construction,  by  focusing  on  critical  factors,    adopting  them  according  to  the requirements  of the construction. Originality/value: Based on the presented results, concluded that the scenario formation of increasing sustainability of the sustainability of supply chains  by the introduction of adaptive information technologies allows to take into account all groups of selected factors, while ensuring synchronization of production planning, product shipment and inventory management, increasing market feedback, ensuring that production volumes correspond to product demand, as well as reducing logistics costs and the price of products for the end customer.