https://journal.riverpublishers.com/index.php/JGEU <h1>Journal of Graphic Era University</h1> <p>Published by Graphic Era (Deemed to be University), India</p> <p>The frequency of publication is Bi annual</p> <p><strong><em>Journal of Graphic Era University</em></strong> is an international journal of science and technology which published the articles/review papers/case studies that demonstrate interaction between various disciplines such as electronics engineering, mechanical and automobile engineering, petroleum engineering, computer science &amp; engineering, electrical engineering, civil engineering, management, mathematical sciences, space sciences, allied sciences and humanities, biotechnology and their applications.<br />JGEU is an Open Access Journal, and does not charge readers or their institutions for access to the journal articles. The open access supports the rights of users to read, download, copy, distribute, print, search, or link to the full texts of these articles provided they are properly acknowledged and cited.</p> River Publishers en-US Journal of Graphic Era University 0975-1416 https://journal.riverpublishers.com/index.php/JGEU/article/view/373 <p>Mining machines represent complex technical systems exposed to very difficult and demanding working conditions. The requirement of a high degree of effectiveness of technical systems in surface mines conditions a special organization of maintenance. The maintenance imperative is to ensure high reliability of parts of technical systems. For the maintenance of complex systems, made up of a large number of components, the parts whose failures cause the greatest negative consequences for the complete production system are particularly important. Analysis of the criticality of parts of technical systems directs maintenance activities to the prevention of failure states on key elements and ensuring the highest possible degree of their reliability. The paper presents the methodology of defining the critical position of the technical system Bucket-Wheel Excavator – belt conveyor – dumper on the open pit using the critical position selection algorithm. The basic criterion for choosing a critical position is a comparison of the frequency of failure and the reliability of individual components of technical systems. The results of the analysis confirm the connection of the statistical data analysis of the number of failure states of the working positions of the technical system with empirically determined reliability functions according to the methodology of non-parametric determination of reliability. The presented algorithm represents a methodology for recognizing the critical elements of technical systems whose operation has the greatest impact on the stability of the functioning of the complete technical system. Optimizing critical positions reduces total system downtime, increases productivity and improves overall business results.</p> Dejan Branković Zdravko Milovanović Valentina Janièić-Milovanović Copyright (c) 2024 Journal of Graphic Era University 2024-12-19 2024-12-19 1 30 10.13052/jgeu0975-1416.1311