Browsing Industrial Engineering by Author "2"
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Benchmarking regression algorithms for income prediction modeling
Kibekbaev, Azamat; Duman, Ekrem (Elsevier, 2016)This paper aims to predict incomes of customers for banks. In this large-scale income prediction benchmarking paper, we study the performance of various state-of-the-art regression algorithms (e.g. ordinary least squares ... -
Benchmarking regression algorithms for income prediction modeling
Kibekbaev, Azamat; Duman, Ekrem (IEEE, 2015)This paper aims to predict incomes of customers for banks. In this large-scale income prediction benchmarking paper, we study the performance of various state-of-the-art regression algorithms (e.g. ordinary least squares ... -
Blood supply chain management and future research opportunities
Ekici, Ali; Özener, Okan Örsan; Göktürk, Elvin Çoban (Springer, 2018)In this chapter, we discuss the challenges and research opportunities in the blood collection operations and explore the benefits of recent advances in the blood donation process. According to the regulations, donated blood ... -
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 ... -
Coordinating collection and appointment scheduling operations at the blood donation sites
Mobasher, A.; Ekici, Ali; Özener, Okan Örsan (Elsevier, 2015-09)According to the regulations imposed by the U.S. Food and Drug Administration and the American Association of Blood Banks, in order to extract platelets, donated blood units have to be processed at a processing center ... -
Cyclic delivery schedules for an inventory routing problem
Ekici, Ali; Özener, Okan Örsan; Kuyzu, G. (Informs, 2015-11)We consider an inventory routing problem where a common vendor is responsible for replenishing the inventories of several customers over a perpetual time horizon. The objective of the vendor is to minimize the total cost ... -
Cyclic ordering policies from capacitated suppliers under limited cycle time
Ekici, Ali; Özener, Okan Örsan; Duran, S. (Elsevier, 2019-02)In this paper, we study the ordering policy of a manufacturer/retailer which procures a single item from multiple capacitated suppliers and satisfies an exogenous deterministic and constant demand. Manufacturer's objective ... -
Detecting credit card fraud by modified Fisher discriminant analysis
Mahmoudi, Nader; Duman, Ekrem (Elsevier, 01.04.2015)In parallel to the increase in the number of credit card transactions, the financial losses due to fraud have also increased. Thus, the popularity of credit card fraud detection has been increased both for academicians and ... -
Dynamic facility location with supplier selection under quantity discount
Emirhüseyinoğlu, Görkem; Ekici, Ali (Elsevier, 2019-08)Retailers have to consider several factors when making facility location decisions including suppliers' and customers' locations, customer demand and price offered by suppliers. In this study, we analyze the multi-period ... -
An effective formulation of the multi-criteria test suite minimization problem
Özener, Okan Örsan; Sözer, Hasan (Elsevier, 2020-10)Test suite minimization problem has been mainly addressed by employing heuristic techniques or integer linear programming focusing on a specific criterion or bi-criteria. These approaches fall short to compute optimal ... -
An EOQ model with deteriorating items and self-selection constraints
Önal, Mehmet; Kundakcıoğlu, Ömer Erhun (Springer Nature, 2020-09)In this paper, we consider a store that sells two vertically differentiated items that might substitute each other. These items do not only differ in quality and price, but they also target two different customer segments. ... -
Exact and heuristic approaches to detect failures in failed k-out-of-n systems
Yavuz, Tonguç; Kundakcıoğlu, Ömer Erhun; Ünlüyurt, T. (Elsevier, 2019-12)This paper considers a k-out-of-n system that has just failed. There is an associated cost of testing each component. In addition, we have apriori information regarding the probabilities that a certain set of components ... -
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 ... -
Improving blood products supply through donation tailoring
Özener, Okan Örsan; Ekici, Ali; Göktürk, Elvin Çoban (Elsevier, 2019-02)Recent technological advances, called Multicomponent Apheresis, allow tailoring the blood donations based on the demand and current inventory levels of blood products. Different from the most common type of blood donation ... -
Integrated blood collection and appointment scheduling
Mobasher, A.; Ekici, Ali; Özener, Okan Örsan (Institute of Industrial Engineers, 2012)Considering the processing requirements of donated blood, we study an integrated blood collection and appointment scheduling problem. We develop a mixed integer programming model to maximize the amount of donated blood ... -
Inventory routing for the last mile delivery of humanitarian relief supplies
Ekici, Ali; Özener, Okan Örsan (Springer Nature, 2020-09)Fast and equitable distribution of the humanitarian relief supplies is key to the success of relief operations. Delayed and inequitable deliveries can result in suffering of affected people and loss of lives. In this study, ... -
A literature review on inventory management in humanitarian supply chains
Koyuncu, Burcu Balçık; Bozkir, Cem Deniz Çağlar; Kundakcıoğlu, Ömer Erhun (Elsevier, 2016)In this paper, we present a review and analysis of studies that focus on humanitarian inventory planning and management. Specifically, we focus on papers which develop policies and models to determine how much to stock, ... -
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 ... -
Managing platelet supply through improved routing of blood collection vehicles
Özener, Okan Örsan; Ekici, Ali (Elsevier, 2018-10)In this paper, we study the routing of blood collection vehicles for improving the platelet supply in the blood supply chain. In order to extract platelets, donated blood has to be processed at a central processing facility ... -
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 ...
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