Browsing Industrial Engineering by Author "(ORCID 0000-0001-5004-0578 & YÖK ID 144710) Albey, Erinç"
Now showing items 1-16 of 16
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A CART-based genetic algorithm for constructing higher accuracy decision trees
Ersoy, Elif; Albey, Erinç; Kayış, Enis (SciTePress, 2020)Decision trees are among the most popular classification methods due to ease of implementation and simple interpretation. In traditional methods like CART (classification and regression tree), ID4, C4.5; trees are constructed ... -
A chance constraint based multi-item production planning model using simulation optimization
Albey, Erinç; Uzsoy, R.; Kempf, K. G. (IEEE, 2016)We consider a single stage multi-item production-inventory system under stochastic demand. We had previously proposed a production planning model integrating ideas from forecast evolution and inventory theory to plan work ... -
Churn prediction for mobile prepaid subscribers
Can, Zehra; Albey, Erinç (Institute for Systems and Technologies of Information, Control and Communicatio, 2017)In telecommunication, mobile operators prefer to acquire postpaid subscribers and increase their incoming revenue based on the usage of postpaid lines. However, subscribers tend to buy and use prepaid mobile lines because ... -
Çevik yöntemlerde cosmic i̇şlev puanı ve hikaye puanının birlikte kullanımı
Ertaban, C.; Gezgin, S.; Bağrıyanık, S.; Albey, Erinç; Karahoca, A. (CEUR-WS, 2017)Hikaye Puanı (SP: Story Point), Scrum ve Kanban gibi çevik yöntemlerde kullanılan en yaygın metriklerden birisidir. Subjektif bir metrik olsa da kullanışlı ve basit olması nedeniyle çevik ekiplerin birikim listelerinde ... -
Economic lot sizing problem with inventory dependent demand
Önal, Mehmet; Albey, Erinç (Springer Nature, 2020-11)We consider an economic lot sizing problem where the demand in a period is a piecewise linear and concave function of the amount of the available inventory after production in that period. We show that the problem isNPhard ... -
Effective training methods for automatic musical genre classification
Atsız, Eren; Albey, Erinç; Kayış, Enis (SciTePress, 2019)Musical genres are labels created by human and based on mutual characteristics of songs, which are also called musical features. These features are key indicators for the content of the music. Rather than predictions by ... -
A hierarchical approach for solving simultaneous lot sizing and scheduling problem with secondary resources
Şafak, C. U.; Yılmaz, Görkem; Albey, Erinç (Elsevier, 2019)This study represents a decomposition heuristic approach for simultaneous lot sizing and scheduling problem for multiple product, multiple parallel machines with secondary resources. The motivation of the study comes from ... -
Load dependent lead time modelling: a robust optimization approach
Albey, Erinç; Yanıkoğlu, İhsan; Uzsoy, R. (IEEE, 2018-01-04)Although production planning models using nonlinear CFs have shown promising results for semiconductor wafer fabrication facilities, the lack of an effective methodology for estimating the CFs is a significant obstacle to ... -
A Markovian approach for time series prediction for quality control
Şahin, Ahmet; Sayımlar, Ayşe Dilara; Teksan, Zehra Melis; Albey, Erinç (Elsevier, 2019)In this work we aim to predict quality levels of incoming batches of a selected product type to a white goods manufacturer from a third party supplier. We apply a Markov Model that captures the quality level of the incoming ... -
A mathematical model for customer lifetime value based offer management
Şahin, Ahmet; Can, Zehra; Albey, Erinç (Springer, 2018)Customers with prepaid lines possess higher attrition risk compared to postpaid customers, since prepaid customers do not sign long-term obligatory contracts and may churn anytime. For this reason, mobile operators have ... -
Multi-dimensional clearing functions for aggregate capacity modelling in multi-stage production systems
Albey, Erinç; Bilge, Ü.; Uzsoy, R. (Informa, 2017)Nonlinear clearing functions have been proposed in the literature as metamodels to represent the behaviour of production resources that can be embedded in optimisation models for production planning. However, most clearing ... -
Optimizing steering of roaming traffic with a-number billing under a rolling horizon policy
Şahin, Ahmet; Demirel, Kenan Cem; Ceyhan, Ege; Albey, Erinç (Springer, 2020)In this study, we focus on single service steering international roaming traffic (SIRT) problem by considering telecommunication operators’ agreements and “a-number billing” while keeping service quality above a certain ... -
A robust optimization approach for production planning under exogenous planned lead times
Albey, Erinç; Yanıkoğlu, İhsan; Uzsoy, R. (IEEE, 2019)Many production planning models applied in semiconductor manufacturing represent lead times as fixed exogenous parameters. However, in reality, lead times must be treated as realizations of released lots' cycle times, which ... -
Rounding heuristics for multiple product dynamic lot-sizing in the presence of queueing behavior
Kang, Y.; Albey, Erinç; Uzsoy, R. (Elsevier, 2018-12)We present heuristics for solving a difficult nonlinear integer programming (NIP) model arising from a multi-item single machine dynamic lot-sizing problem. The heuristic obtains a local optimum for the continuous relaxation ... -
Şebeke kaynaklı müşteri şikayetleri için akıllı teşhis ve çözüm sistemleri
Kasapoğulları, T.; Öneş, O.; Albey, Erinç (IEEE, 2016)In the telecommunication sector, there exists a vast variety of protocol data (Such as ADR, IUCS, GB, IUPS, GN) produced by signaling systems. The data contains various information regarding network quality and performance. ... -
A web-based decision support system for quality prediction in manufacturing using ensemble of regressor chains
Demirel, Kenan Cem; Şahin, Ahmet; Albey, Erinç (Springer, 2020)In this study we construct a decision support system (DSS), which utilizes the production process parameters to predict the quality characteristics of final products in two different manufacturing plants. Using the idea ...
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