Urbanization and the rapid growth of e-commerce have significantly increased delivery volumes in cities, creating challenges in terms of cost, efficiency, and sustainability in last-mile delivery (LMD). To address these challenges, this paper proposes an innovative methodological framework for selecting optimal delivery strategies in urban environments, grounded in the principles of collaboration. The framework integrates an Extended FullEx method, developed to calculate criteria weights while accounting for expert reputation based on education and experience, with the MARCOS multi-criteria decision-making (MCDM) method used to rank delivery strategies. The Extended FullEx method proposed in this paper differs from the original FullEx by providing two improvements. The first concerns the introduction of the normalization procedure in the calculation of experts’ reputations, while the second addresses the different scoring of educational degrees, providing a more precise mathematical basis for the process. Four collaborative delivery strategies are evaluated against twelve sustainability-related criteria identified through an extensive literature review. The proposed framework is applied to a real-life case study in Novi Sad, Republic of Serbia. Results indicate that the most suitable delivery strategy is a hybrid model that combines the use of a consolidation center with smaller urban delivery hubs, providing practical insights for enhancing the sustainability and efficiency of urban delivery. This study contributes both methodologically, by advancing MCDM techniques, and practically, by offering decision-makers a comprehensive tool that integrates subjective expert knowledge and objective criteria assessment in the selection of sustainable LMD solutions.

Human strategies for solving the travelling salesperson problem (TSP) continue to draw the attention of the researcher community, both to further understanding of human decision-making and inspiration for the design of automated solvers. Online games represent an efficient way of collecting large amounts of human solutions to the TSP, and PathGame is a game focusing on non-Euclideanclosed-form TSP. To capture the instinctive decision-making process of the users, PathGame requires users to solve the problem as quickly as possible, while still favouring more efficient tours. In the initial study presented here, we have used PathGame to collect a dataset of over 16,000 tours, containing over 22,000,000 destinations. Our analysis of the data revealed new insights related to ways in which humans solve TSP and the time it takes them when forced to solve TSPs of large complexity quickly.

The Proceedings of the XLIII Symposium on Novel Technologies in Postal and Telecommunications Traffic – PosTel 2025 include the research results in the field of postal and telecommunications traffic completed over the past year. The Symposium is organized by the Department of Postal and Telecommunications Traffic of the Faculty of Transport and Traffic Engineering in Belgrade. The co-organizers are: JP “Pošta Srbije”, “Telekom Srbija” a.d., and the Regulatory Agency for Electronic Communications and Postal Services – RATEL. The event is held under the auspices of the Ministry of Science, Technological Development and Innovation of the Republic of Serbia and the Ministry of Information and Telecommunications of the Republic of Serbia. The Symposium focuses on current research in areas of particular importance for postal and telecommunications traffic in Serbia and the surrounding region. The papers are invited and grouped into three sections: • Management of Processes in Postal and Telecommunications Traffic• Postal Traffic, Networks and Services• Telecommunications Traffic, Networks and Services The section Management of Processes in Postal and Telecommunications Traffic encompasses current research and practical solutions that reflect the deep transformations underway in the modern postal and telecommunications sectors. The papers in this section address key topics such as digitalization, sustainability, inclusivity, technological innovation, and new management models. Special attention is given to the role of public–private partnerships, the application of ESG standards, user protection, development of e-services, and the modernization of operations based on IoT technologies. Through various case studies and analytical approaches, the papers highlight the need for organizational reconfiguration of postal operators, the development of inclusive services, and the improvement of user experience quality. This section provides a comprehensive insight into the challenges and opportunities shaping the future of the postal and telecommunications system, emphasizing the importance of strategic management in the process of digital and green transition. The section Postal Traffic, Networks and Services contains papers that, from scientific and professional perspectives, analyze the postal sector and related current developments. Among other topics, the authors explore strategic directions of postal traffic development and models for applying modern information technologies to optimize. Zbornik radova XLIII Simpozijuma o novim tehnologijama u poštanskom i telekomunikacionom saobraćaju - PosTel 2025, sadrži rezultate istraživanja iz oblasti poštanskog i telekomunikacionog saobraćaja u proteklom jednogodišnjem periodu. Organizator Simpozijuma je Odsek za poštanski i telekomunikacioni saobraćaj Saobraćajnog fakulteta u Beogradu. Suorganizatori su: JP ″Pošta Srbije″, ″Telekom Srbija″ a.d. i Regulatorno telo za elektronske komunikacije i poštanske usluge – RATEL.Pokrovitelji su: Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije i Ministarstvo informisanja i telekomunikacija Republike Srbije.Tematika Simpozijuma vezana je za aktuelna istraživanja u oblastima od posebnog značaja za poštanski i telekomunikacioni saobraćaj, kod nas i u okruženju. Radovi su po pozivu i svrstani su u tri sekcije:* Menadžment procesa u poštanskom i telekomunikacionom saobraćaju,* Poštanski saobraćaj, mreže i servisi,* Telekomunikacioni saobraćaj, mreže i servisi.Sekcija Menadžment poslovnih procesa u poštanskom i telekomunikacionom saobraćaju obuhvata aktuelna istraživanja i praktična rešenja koja odražavaju duboke transformacije u kojima se nalazi savremeni poštanski i telekomunikacioni sektor. Radovi u ovoj sekciji bave se ključnim temama kao što su digitalizacija, održivost, inkluzivnost, tehnološke inovacije i novi modeli upravljanja. Posebna pažnja posvećena je ulozi javnoprivatnih partnerstava, primeni ESG standarda, zaštiti korisnika, razvoju e-usluga i modernizaciji operacija zasnovanih na IoT tehnologijama. Kroz različite studije slučaja i analitičke pristupe, radovi ističu potrebu za organizacionom rekonfiguracijom poštanskih operatora, razvojem inkluzivnih servisa i unapređenjem kvaliteta korisničkog iskustva. Ova sekcija pruža sveobuhvatan uvid u izazove i mogućnosti koje oblikuju budućnost poštanskog i telekomunikacionog sistema, naglašavajući važnost strateškog menadžmenta u procesu digitalne i zelene transformacije.Sekcija Poštanski saobraćaj, mreže i servisi sadrži radove koji sa naučnog i stručnog aspekta analiziraju poštanski sektor i pripadajuće aktuelnosti. Autori radova, između ostalog, istražuju strateške pravce razvoja poštanskog saobraćaja, zatim modele primene savremenih informacionih tehnologija za optimizaciju kako tehnološkog procesa, tako iVI regulative. Teme od interesa odnose se na održivost poslovanja poštanskih operatora, sa posebnim akcentom na unapređenje dostave. Kvalitet univerzalne poštanske usluge i proces standardizacije u poštanskom saobraćaju su neki od ključnih izazova. Takođe, predmet interesovanja u ovoj sekciji je primena savremenih tehnoloških rešenja u poštanskoj logistici. Pored toga, autori predlažu primenu odgovarajućih metoda višekriterijumske analize za rangiranje sistema za preradu paketskih pošiljaka.Radovi u sekciji Telekomunikacioni saobraćaj, mreže i servisi posvećeni su aktuelnim dostignućima u razvoju...

Fast and successful delivery for companies that provide delivery services is the core of the business and is of great importance for competitiveness in the market. In urban areas, various factors make it difficult to deliver shipments to users, so companies often experiment with technical and organizational improvements to mitigate or eliminate the effects of these factors. Crowdsourced delivery has emerged as one of the solutions. This paper will present the experiences of companies dealing with this type of delivery, as well as point out the possibilities of applying this delivery in the territory of Serbia.

Starting from n roots of a univariate polynomial of n -th degree, combining the first, the second, and up to the n -th class, new polynomials are generated. Each class of polynomials obtained in such a way is fully determined by its roots. The arithmetic means of corresponding coefficients are proportional to the values of the coefficients obtained by the derivation of the initial univariate polynomial. This gives the basis for the algebraic approach to the polynomial derivation.