• Humanitarian relief supplies distribution: an application of inventory routing problem 

  Çankaya, Emre; Ekici, Ali; Özener, Okan Örsan (Springer, 2018-02-06)

  In this paper, we study the distribution of humanitarian relief supplies. In humanitarian relief, supplies including food, water and medication are received in batches/waves from the suppliers and the donors. Then, these ...

• Disaster preparedness using risk-assessment methods from earthquake engineering 

  Battarra, M.; Balçık, Burcu; Xu, H. (Elsevier, 2018-09)

  Analyzing the uncertainties associated with disaster occurrences is critical to make effective disaster preparedness plans. In this study, we focus on pre-positioning emergency supplies for earthquake preparedness. We ...

• 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 ...

• Decision rule bounds for two-stage stochastic bilevel programs 

  Yanıkoğlu, İhsan; Kuhn, D. (Society for Industrial and Applied Mathematics Publications, 2018)

  We study two-stage stochastic bilevel programs where the leader chooses a binary here-and-now decision and the follower responds with a continuous wait-and-see decision. Using modern decision rule approximations, we construct ...

• Disaster preparedness using risk-assessment methods from earthquake engineering 

  Battarra, M.; Balçık, Burcu; Xu, H. (Elsevier, 2018-09-01)

  Analyzing the uncertainties associated with disaster occurrences is critical to make effective disaster preparedness plans. In this study, we focus on pre-positioning emergency supplies for earthquake preparedness. We ...

• Solving the integrated shipment routing problem of a less-than-truckload carrier 

  Özener, Okan Örsan (Elsevier, 2017)

  We study a less-than-truckload (LTL) transportation network and investigate the potential benefits of implementing an integrated solution approach for shipment routing throughout this network. In LTL transportation, shipments ...

• 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 ...

• An approach for predicting employee churn by using data mining 

  Yiğit, İ. O.; Shourabizadeh, Hamed (IEEE, 2017)

  Employee churn prediction which is closely related to customer churn prediction is a major issue of the companies. Despite the importance of the issue, there is few attention in the literature about. In this study, we ...

• 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 ...

• Special issue in humanitarian operations 

  Balçık, Burcu (Elsevier, 2016-12)

• Site selection and vehicle routing for post-disaster rapid needs assessment 

  Balçık, Burcu (Elsevier, 2017-05)

  In the immediate aftermath of a disaster, relief agencies perform rapid needs assessment to investigate the effects of the disaster on the affected communities. Since assessments must be performed quickly, visiting all of ...

• Evaluation of sources for the sustainability of energy supply in Turkey 

  Kuleli Pak, B.; Albayrak, Y. E.; Erensal, Y. C. (Wiley, 2017)

  Energy is one of the main factors that must be considered in the discussions of sustainable development. Renewable, clean and cost effective energy sources are preferred but unfortunately no one of the alternative energy ...

• 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 ...

• 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 ...

• A model to estimate cost-savings in diabetic foot ulcer prevention efforts 

  Barshes, N. R.; Saedi, S.; Wrobel, J.; Kougias, P.; Kundakçıoğlu, Ömer Erhun; Armstrong, D. G. (Elsevier, 2017)

  Background: Sustained efforts at preventing diabetic foot ulcers (DFUs) and subsequent leg amputations are sporadic in most health care systems despite the high costs associated with such complications. We sought to estimate ...

• Solving a large-scale integrated fleet assignment and crew pairing problem 

  Özener, Okan Örsan; Örmeci Matoğlu, M.; Erdoğan, G.; Haouari, M.; Sözer, Hasan (Springer International Publishing, 2017)

  Airline schedule planning problems are typically decomposed into smaller problems, which are solved in a sequential manner, due to the complexity of the overall problems. This results in suboptimal solutions as well as ...

• Selective routing for post-disaster needs assessments 

  Balçık, Burcu (Springer International Publishing, 2016)

  In the immediate aftermath of a disaster, relief agencies perform needs assessment operations to investigate the effects of the disaster and understand the needs of the affected communities. Since assessments must be ...

• Integrating social network effects in the share-of-choice problem 

  Günneç, Dilek; Raghavan, S. (Wiley, 2017-12)

  Accounting for social network effects in marketing strategies has become an important issue. Taking a step back, we seek to incorporate and analyze social network effects on new product development and then propose a model ...

• A literature review on inventory management in humanitarian supply chains 

  Balçık, Burcu; Bozkir, C. D. C.; Kundakçıoğlu, 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, ...

• A mathematical model for perishable products with price- and displayed-stock-dependent demand 

  Onal, M.; Yenipazarli, A.; Kundakçıoğlu, Ömer Erhun (Elsevier, 2016-12)

  We introduce an economic order quantity model that incorporates product assortment, pricing and space-allocation decisions for a group of perishable products. The goal is to maximize the retailer’s profit under shelf-space ...

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