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Firstly, two classification techniques which are multi perceptron neural networks and radial basis neural networks are applied as supervised techniques to classify whether the internet connection of customers is problematic or not. Then, by using unsupervised techniques, namely Kohonnen\u2019s neural networks and Adaptive Resonance Theory neural networks, the same data set is clustered and the clusters are used for the customer problem prediction. The methods are then integrated with an ensemble technique bagging. Each method is implemented with bagging in order to obtain improvement on the estimation error and variation of the accuracy. Finally, the results of the methods applied for classification and clustering with and without bagging are evaluated with performance measures such as recall, accuracy and Davies-Bouldin index, respectively.<\/jats:p>","DOI":"10.3233\/jifs-219207","type":"journal-article","created":{"date-parts":[[2021,7,13]],"date-time":"2021-07-13T14:30:48Z","timestamp":1626186648000},"page":"503-515","source":"Crossref","is-referenced-by-count":1,"title":["A neural networks approach to predict call center calls of an internet service provider1"],"prefix":"10.1177","volume":"42","author":[{"given":"\u00d6zge H.","family":"Naml\u0131","sequence":"first","affiliation":[{"name":"Department of Industrial Engineering, Faculty of Engineering, Turkish-German University, Beykoz, Istanbul, Turkey"},{"name":"Department of Industrial Engineering, Faculty of Management, Istanbul Technical University, Macka, Istanbul, Turkey"}]},{"given":"Seda","family":"Yan\u0131k","sequence":"additional","affiliation":[{"name":"Department of Industrial Engineering, Faculty of Management, Istanbul Technical University, Macka, Istanbul, Turkey"}]},{"given":"Faranak","family":"Nouri","sequence":"additional","affiliation":[{"name":"Department of Industrial Engineering, Faculty of Management, Istanbul Technical University, Macka, Istanbul, Turkey"}]},{"given":"N.","family":"Serap \u015eeng\u00f6r","sequence":"additional","affiliation":[{"name":"Department of Industrial Engineering, Faculty of Management, Istanbul Technical University, Macka, Istanbul, Turkey"}]},{"given":"Yusuf Mertkan","family":"Koyuncu","sequence":"additional","affiliation":[{"name":"Turkcell \u0130leti\u015fim Hizmetleri A\u015e, Maltepe, Istanbul, Turkey"}]},{"given":"\u00d6mer Berk","family":"U\u00e7ar","sequence":"additional","affiliation":[{"name":"Turkcell \u0130leti\u015fim Hizmetleri A\u015e, Maltepe, Istanbul, 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