{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T17:35:47Z","timestamp":1778175347271,"version":"3.51.4"},"reference-count":37,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2021,10,9]],"date-time":"2021-10-09T00:00:00Z","timestamp":1633737600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"ELIS Innovation Hub","award":["Joint Research Project within the framework of the Mindset Revolution Semester"],"award-info":[{"award-number":["Joint Research Project within the framework of the Mindset Revolution Semester"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Future Internet"],"abstract":"<jats:p>The paper proposes a data-driven strategy for predicting technical ticket reopening in the context of customer service for telecommunications companies providing 5G fiber optic networks. Namely, the main aim is to ensure that, between end user and service provider, the Service Level Agreement in terms of perceived Quality of Service is satisfied. The activity has been carried out within the framework of an extensive joint research initiative focused on Next Generation Networks between ELIS Innovation Hub and a major network service provider in Italy over the years 2018\u20132021. The authors make a detailed comparison among the performance of different approaches to classification\u2014ranging from decision trees to Artificial Neural Networks and Support Vector Machines\u2014and claim that a Bayesian network classifier is the most accurate at predicting whether a monitored ticket will be reopened or not. Moreover, the authors propose an approach to dimensionality reduction that proves to be successful at increasing the computational efficiency, namely by reducing the size of the relevant training dataset by two orders of magnitude with respect to the original dataset. Numerical simulations end the paper, proving that the proposed approach can be a very useful tool for service providers in order to identify the customers that are most at risk of reopening a ticket due to an unsolved technical issue.<\/jats:p>","DOI":"10.3390\/fi13100259","type":"journal-article","created":{"date-parts":[[2021,10,10]],"date-time":"2021-10-10T21:23:25Z","timestamp":1633901005000},"page":"259","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["On Predicting Ticket Reopening for Improving Customer Service in 5G Fiber Optic Networks"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3809-8886","authenticated-orcid":false,"given":"Lorenzo","family":"Ricciardi Celsi","sequence":"first","affiliation":[{"name":"ELIS Innovation Hub, Via Sandro Sandri 81, 00159 Roma, Italy"},{"name":"Department of Computer, Control, and Management Engineering Antonio Ruberti, Sapienza Universit\u00e0 di Roma, Via Ariosto 25, 00185 Roma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0402-8732","authenticated-orcid":false,"given":"Andrea","family":"Caliciotti","sequence":"additional","affiliation":[{"name":"Department of Computer, Control, and Management Engineering Antonio Ruberti, Sapienza Universit\u00e0 di Roma, Via Ariosto 25, 00185 Roma, Italy"},{"name":"Enel Green Power S.p.A., Viale Regina Margherita 125, 00198 Roma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7973-3458","authenticated-orcid":false,"given":"Matteo","family":"D'Onorio","sequence":"additional","affiliation":[{"name":"DIAEE, Sapienza Universit\u00e0 di Roma, Corso Vittorio Emanuele II 244, 00186 Roma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3403-7392","authenticated-orcid":false,"given":"Eugenio","family":"Scocchi","sequence":"additional","affiliation":[{"name":"ERG S.p.A., Via Bissolati 76, 00187 Roma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nour Alhuda","family":"Sulieman","sequence":"additional","affiliation":[{"name":"Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Universit\u00e0 di Messina, Piazza Pugliatti 1, 98122 Messina, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Massimo","family":"Villari","sequence":"additional","affiliation":[{"name":"Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Universit\u00e0 di Messina, Piazza Pugliatti 1, 98122 Messina, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,10,9]]},"reference":[{"key":"ref_1","first-page":"284","article-title":"Decision support systems for IT service management","volume":"8","author":"Valverde","year":"2016","journal-title":"Int. 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