http://orel.unionnikolatesla.edu.rs/index.php/orel <p><em>Operations Research and Engineering Letters </em><em>(OREL)</em> publishes high-quality scientific papers that contribute significantly to the field of operational research and engineering science. The material published is of high quality and relevance, written in a manner that makes it accessible to all of this wide-ranging readership. Preference will be given to papers with decision-making implications to the practice of management and engineering.</p> <p><em>Aims and Scope</em></p> <p>The principal aim of the journal is to bring together the latest research and development in various fields of operational research. We would like to highlight that papers should refer to <a href="http://orel.unionnikolatesla.edu.rs/index.php/orel/aims" target="_blank" rel="noopener">Aims and scope</a>, but they are not limited to.</p> <p><em>Publication Frequency </em></p> <p>One issue per year is published online, but processed and accepted papers, with full bibliographic data, are added to the issue continuously over the whole year.</p> <p><em>Open Access</em></p> <p>This is an open-access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author.</p> <p><em>Publication fee</em></p> <p>There is no submission charge or publication fee. Publication in OREL is free of charge for the authors.</p> <p><em>Publisher</em></p> <p><a href="https://www.unionnikolatesla.edu.rs/en/about-university/faculties/faculty-of-civil-engineering" target="_blank" rel="noopener">Faculty of Civil Engineering Management, University “Union–Nikola Tesla”, Belgrade, Serbia</a></p> Faculty of Civil Engineering Management, University “Union–Nikola Tesla”, Belgrade, Serbia en-US Operations Research and Engineering Letters 2812-9318 http://orel.unionnikolatesla.edu.rs/index.php/orel/article/view/24 <p>The paper presents and analyzes the factors that affect the enrollment and completion of studies of candidates in the Geodesy study program at the Faculty of Architecture, Civil Engineering and Geodesy of the University of Banja Luka, who were enrolled in the first admission period in the period 2012 to 2015. The influence of mathematics subjects on the completion of studies was analyzed in particular. With advanced techniques for data analysis, generation of decision trees and related rules, using data mining methods, it was shown that passing at least one mathematics course in the current academic year is an important predictor for the completion of studies.</p> Ljubiša Preradović Snježana Maksimović Sandra Kosić-Jeremić Đorđe Stojisavljević Copyright (c) 2024 Ljubiša Preradović, Snježana Maksimović , Sandra Kosić-Jeremić, Đorđe Stojisavljević https://creativecommons.org/licenses/by/4.0 2024-01-27 2024-01-27 3 1 1 7 http://orel.unionnikolatesla.edu.rs/index.php/orel/article/view/23 <p>The paper presents a hybrid model of choosing a combat unmanned ground platform using the DIBR and grey – EDAS (G-EDAS) method. This model has been tested and confirmed on a case study in which combat unmanned platforms for the needs of the military were optimized. The criteria were defined, and then the DIBR method was used to determine the severity of the criteria. The ranking and selection of the most favorable alternative (combat unmanned ground platform) was carried out using the G-EDAS method. An analysis of the sensitivity of the proposed model was performed depending on the change in the weighting coefficients of the criteria. The proposed model has proven to be stable and is a reliable tool for the decision maker when choosing.</p> Marko Radovanović Darko Božanić Aleksandar Petrovski Aleksandar Milić Copyright (c) 2024 Marko Radovanović, Darko Božanić, Aleksandar Petrovski, Aleksandar Milić https://creativecommons.org/licenses/by/4.0 2024-01-27 2024-01-27 3 1 8 18 http://orel.unionnikolatesla.edu.rs/index.php/orel/article/view/22 <p>In this paper, we propose a way to design a digital platform as a solution concept specifically created to serve as the foundation for the development and ongoing enhancement of tools that streamline and accelerate the management of investment project.&nbsp;Particularly, we present PIMCOD, a blockchain-driven Property Investment Management Collaboration Platform aimed at improving civil engineering investment projects. Leveraging blockchain, PIMCOD offers secure, real-time highly transparent project management with cryptographic security features. It represents a transformative approach to civil engineering project management, distinguishing itself from traditional solutions. In response to evolving technological&nbsp;landscapes, PIMCOD －an implementation of our solution concept, streamlines processes, enhances efficiency, and reduces costs.&nbsp;Future plans include tokenization, IoT, AR/VR, different monitoring technologies, extended BIM, analytics, mobile apps, and supply chain enhancements.</p> Čedomir Vukobrat Đorđe Marčetin Slobodan Begojev Biljana Franić-Lazarević Dimitrije Čvokić Copyright (c) 2024 Čedomir Vukobrat, Đorđe Marčetin, Slobodan Begojev, Biljana Franić-Lazarević, Dimitrije Čvokić https://creativecommons.org/licenses/by/4.0 2024-02-01 2024-02-01 3 1 19 45