The introduction of new technologies for diagnosing underground metal pipelines with dangerous surface defects is a practically important task. That is why studies aimed at improving the methods of assessing the quality of deformed metal pipelines and structural elements are necessary and relevant. The evaluation of the effectiveness of engineering and technological solutions for oil and gas enterprises needs improvement. In this context, an important task is to solve the problem of quality control (including durability) of gas and oil transportation systems and the improvement of appropriate metrological support. Based on surface physics and fracture mechanics, development of a methodological approach to assessing the quality and resource of underground metal pipelines (UMP) of oil and gas enterprises, taking into account the constructions strength, corrosion fatigue, parameters of corrosion protection and metrological support. Results of processing of normative documents and scientific works in the field of gas transportation enterprises, as well as methods of surface physics, mechanics of deformed solid body, fracture mechanics, qualimetry regarding the system “pipeline (UMP) – coating”. A new criterion for the strength of the surface of a metal underground pipe is proposed, which characterizes the peculiarities of bond fractures (adhesion) between the coating and the metal. Using the criterion of the strength of a metal tube with a defect in the electrolyte, the dependence of the critical internal pressure of the gas pipeline (UMP) on the geometric and energy (elastic and plastic) parameters of the metal, as well as the current of the anodic dissolution, which characterizes the features of the crack propagation at the bottom of the corrosion cavern. On the basis of surface physics and fracture mechanics obtained, a methodology for evaluating the quality of underground metal pipelines of oil and gas enterprises was developed to determine their resource, taking into account strength, corrosion fatigue, parameters of corrosion protection and metrological support.

Introduction. The growing importance of information support (its quality and completeness) in the activities of commercial enterprises in terms of total digitalization, necessitate the formation of an effective system of accounting and analytical support for the management of their economic activity. Purpose. The purpose of the article is to form a model of accounting and analytical support for managing the economic activity of commercial enterprises. Method (methodology). Theoretical and methodological basis of the study were modern theories, concepts, scientific achievements of domestic and foreign scientists in the field of economic management and accounting. The study of the composition of accounting and analytical support for the management of economic activity, the essence of the constituent elements was carried out using scientific abstraction, terminological and comparative analysis and synthesis; study of the relationships between the components of accounting and analytical support of economic activity management and model formation – modeling methods, system-functional and functional-structural methods. Results. In the process of studying the peculiarities of the formation of accounting and analytical management of economic activity of commercial enterprises determined that the main elements of such a system include: stakeholders (users of information), streams of input and output information, qualitative characteristics and composition of which requires special attention, information security, staffing the implementation of the model, the basic principles of its implementation and the expected effectiveness. The users of accounting and analytical information include: business owners (shareholders), managers of various hierarchical and functional levels, staff, banks, government agencies, debtors and creditors, investment analysts, competitors and the public. It is determined that the key role in accounting and analytical support of management of economic activity of trade enterprises is played by information, which is gradually, in the process of economic activity, information processing measures and by implementing management decisions transformed from input to output. To make quality management decisions, such information must be reliable, complete (sufficient), valuable, rich, timely, relevant and symmetrical. In characterizing the components of accounting and analytical support, the importance of non-compliance with the requirements for the use of information in commercial enterprises and the creation of appropriate staffing to manage their economic activity is determined. The model of accounting and analytical support for the management of economic activity of commercial enterprises reflects the gradual, controlled transition of a large amount of information into sound management decisions to ensure the appropriate level of their economic activity.

The issue of determining the strategic guidelines for planning the sustainable development of the socio-economic system through increasing the efficiency of its personnel management remains relevant and new. That is why, from a variety of topics in the scientific and practical literature, our study is interesting and important. The main purpose of the article is to model the strategic guidelines for planning the sustainable development of a single socio-economic system through improving the efficiency of personnel management in the security system. The object of the study is the planning system for sustainable development of a single socioeconomic system. The research methodology was based on modern methods of econometric modeling aimed at determining the strategic guidelines for planning sustainable development for a particular socio-economic system. Based on the results of the study, the article presented a model of strategic guidelines for planning sustainable development for a particular socioeconomic system through increasing the efficiency of personnel management in the security system. Also, practical results are presented by analyzing the dynamics of the implementation of certain sustainable development planning targets. The study is limited by focusing only on a single socio-economic system. Further research will focus on the direct implementation of sustainable development measures.

The purpose of the article is to clarify the essence of the digital economy, to determine the degree of its influence on the conditions of activity and management of business entities, to determine the prerequisites and opportunities for adjusting the system of values, priorities and guidelines in order to build new models of management of business entities with the help of BIG DATA. The article examines the content of the categories "digital economy", "digitalization" and BIG DATA, highlights the key components of the digital economy. It has been established that the introduction of digitalization elements by business entities significantly increases the possibilities of new management formats of consumer market entities, affects the degree of their economic development, competitiveness, etc. The difficulties faced by the process of digitization and the development of the digital economy in Ukraine are considered, the country's place in the Global Digital Competitiveness Rating, as well as the indicators of Ukraine's innovative development are examined The positive aspects of the "digital transformation of the economy" are singled out. It is claimed that the rapid development of the digital economy led to the development of new technologies - Big Data, the use of which significantly simplifies the processing of large data sets through the use of digital methods and tools. The main indicators of identifying the dynamics of the development of the global Big Data market (aggregate income of the Big Data market and losses of Big Data market subjects from data leakage) were studied, based on which conclusions can be drawn about its permanent expansion. It is noted that the main goal of the Big Data system is to transform complex data into accessible information to simplify the process of making management decisions in real time. A list of Big Data Analytics software is offered, which is used for effective data processing and achieving a competitive advantage in the market, and its software analytical tools allow you to monitor customer needs, current market changes and other valuable information. Apache Hadoop is highlighted among the most popular analytics tools for working with Big Data; Spark; Cassandra and Talend, their brief technical characteristics are given. Based on the results of the research, the conclusions are formulated that Big Data allows businesses to identify new opportunities and create new types of companies, and to use the information obtained to optimize business processes.

The article discusses the relevance of liberalization of trade relations, which has a positive impact on the change in trade turnover; the approaches to understanding the category of «trade wars» are defined; a list of forms of trade wars as well as a brief characterization of them is provided. The methods of conducting offensive and defensive trade wars are studied. Attention is accorded to the generalized and formalized consequences of the conduct of trade wars on the example of the functioning of enterprises in the agricultural industry sector of Ukraine, the definition of which aims at eliminating the problems identified in agricultural enterprises, along with development of the corresponding preventive measures. The specifics of conduct of trade wars between Ukraine, Russia, the USA, China and the EU are considered. It is determined that the tendencies in the development of the Ukrainian agricultural sector are directly dependent on global economic trends. The dynamics of commodity structure of exports of agricultural and food products of Ukraine is studied, on the basis of which it is possible to draw conclusions about benefits and losses for the country. The weaknesses in Ukraine’s export-import policy are identified, including the lack of personnel in agriculture, the problems of logistics and the attraction of additional investment flows, on the basis of which vectors of optimal development of the agricultural industry of Ukraine are formed. The publication lists the growth factors of the agricultural sector of Ukraine, in particular: enhancing the productivity and production in general; increasing the export volumes; orientation of the agricultural producers’ activities towards the niches of the industry; active development of all opportunities for the agricultural production, which is called «Ukrainian organic». The researched motives and policy of trade wars make it possible to offer a more effective apparatus to solve existing problems in the future.