Journal of Engineering Sciences / Журнал інженерних наук
Permanent URI for this collectionhttps://devessuir.sumdu.edu.ua/handle/123456789/34326
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Item A framework and taxonomy for categorizing industrial symbiosis in manufacturing(Sumy State University, 2025) Jakobs, L.; Hofer, A.; Rauch, E.The industrial sector is a significant contributor to global waste, discarding vast amounts annually, which results in both environmental pollution and economic losses. A promising solution is industrial symbiosis (IS), where companies (often from different industries) identify synergies and engage in the exchange of materials, energy, water, and by-products, aiming to close the loop and enhance resource efficiency. Despite growing interest and numerous examples, comprehensive taxonomies for categorizing IS practices in manufacturing remain scarce, as existing studies often focus on individual case studies. This study addresses this gap by proposing a new general taxonomy for the manufacturing sector. Relevant studies were analyzed and synthesized through a systematic literature review of 61 studies, with 22 selected for in-depth analysis of existing IS taxonomies. The findings were refined and validated through iterative expert input, resulting in a three-level taxonomy comprising 4 primary categories, 26 secondary categories, and 119 tertiary categories. The proposed classification provides a holistic framework tailored to the manufacturing sector, enabling practitioners and researchers to gain deeper insights into IS networks and develop effective IS strategies. Future research should validate these categories through empirical studies and explore their practical applications in different manufacturing settings.Item Optimal management in the operation of complex technical systems(Sumy State University, 2024) Дядюра, Костянтин Олександрович; Diadiura, Kostiantyn Oleksandrovych; Oborskyi, G.; Prokopovych, I.; Khamitov, V.; Holubiev, M.Developing a cost management system for a complex technical system (CTS) at the stages of its life cycle is a modern trend aimed at creating sustainable cooperation ties based on requirements, including those of manufacturers and consumers. The article explores the concept of a complex technical system. The principles and properties of a complex technical system were described. A model of a procedure for checking the operability of a complex technical system with an arbitrary distribution of the time of independent manifestation of a failure was proposed for the example of compressor station equipment. Models of operation of complex technical systems based on information about their state were considered. It was also shown how to optimize maintenance decisions for these systems in terms of the minimum average unit cost and how reliable this ensures. Additionally, proof of the existence of an optimal verification strategy was given. An algorithm for determining the moments of verification was developed to ensure the minimum cost. The methods of collecting, processing, and effectively using information for making decisions about the technical condition of complex products and the possibility of further exploitation were improved based on selecting informative diagnostic features and constructing models that comprehensively consider the maximum and current level of their parameters. This allowed for the quality of the final products to be ensured. The practical use of the proposed methods of diagnosis and forecasting made it possible to increase the actual CTS resource by 1.5–2.0 times. This also increased the productivity of the technological process by 1.6 times due to the reduction of the number of stops for maintenance for replacement, adjustments, and sub-adjustments. As a result, the value of the lack of basic production was reduced from 1.2 % to 0.8 %, and the cost of manufacturing products was decreased by 1.2–2.0 times.Item Design and manufacturing of polymer composite materials using quality management methods(Sumy State University, 2023) Берладір, Христина Володимирівна; Берладир, Кристина Владимировна; Berladir, Khrystyna Volodymyrivna; Mitalova, Z.; Павленко, Іван Володимирович; Павленко, Иван Владимирович; Pavlenko, Ivan Volodymyrovych; Trojanowska, J.; Іванов, Віталій Олександрович; Иванов, Виталий Александрович; Ivanov, Vitalii Oleksandrovych; Руденко, Павло Володимирович; Руденко, Павел Владимирович; Rudenko, Pavlo VolodymyrovychMany factors influence the design and manufacturing of products from polymer composite materials. The expert assessment method was applied in the article for the corresponding analysis. A cause-and-effect diagram was built as a result of a preliminary analysis of the influence of factors on the primary indicator of product quality indicators (e.g., wear resistance). Based on the expert assessment results and quality function deployment analysis, the most critical factors affecting wear resistance were obtained: polymer brand, filler shape and size, technological parameters of mixing, pressing, sintering, and mechanical processing. Their impact was studied to establish quantitative dependencies. A stable value of the wear resistance of the product in the manufacturing process can be ensured by timely adjustment of the mixing, pressing, and sintering modes. As a result of the structural analysis of the process of developing materials with predetermined properties at the enterprise according to the IDEF0 methodology, the importance of assessing the risks associated with the process of multi-criteria optimization of their main quality indicators was confirmed.