• 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 ...

• An exact approach for a dynamic workforce scheduling problem 

  Koç, Ersin (2018-01)

  Taking into account the global and national rules and regulations, assigning a given number of employees to planned shifts while paying attention to required working hours, rest times and off day/days is one of the most ...

• Heuristic approaches for assembly line balancing and competent worker assignment problem (ALWABP) 

  Çengil, Muhammet Fatih (2018-01)

  In this study, we focus on assembly line balancing and worker assignment problem, where multiple production lines are executed by a shared pool of workers with varying skills and having absenteeism issues. We developed two ...

• Simultaneous lot sizing, scheduling workforce, overtime and shift planning MIP model including setup times and backlogging decisions 

  Şafak, Cevdet Utku (2017-12)

  Studies focusing on simultaneous lot sizing and scheduling problems, discard the effect of workforce constraints and tactical level decisions such as overtime and selected number of shifts. Generally, in production planning, ...

• A healthcare inventory problem with both reliable and unreliable supply channels 

  Tüfekçi, Mihriban Büşra (2016-05)

  In this study, we investigate the inventory review policy for a healthcare facility to minimize the impact of inevitable drug shortages when an alternative reliable supplier is present. A continuous-time stochastic process ...

• Parametric and non parametric models for stochastic next day operating room scheduling 

  Sevindik, Ömer Hikmet (2018-01)

  Operating rooms are the resources that generate the most part of the revenue of hospitals. On the other hand, they generate the most part of the expenses, as well. Because of the uncertainty of surgery durations, scheduling ...

• Robust scheduling for parallel machines with sequence dependent setup times and uncertain breakdowns 

  Top, Ayşenur Betül (2017-08)

  In this study, machine scheduling activities in the plastic injection production facility of a company competing in electronic sector is investigated. The company designs the products and picks order from customers for ...

• A real life operating room scheduling problem 

  Alper, Gülşah (2015-08)

  A real life operating room scheduling problem is studied using a data set from a leading hospital, Hospital X, in Turkey. After analyzing the real data, we solve daily operating room scheduling problems by mixed integer ...

• Transportation planning for the relief items distribution during an emergency 

  Emre, Çankaya (2017-01)

  We study the inventory slack routing problem (ISRP) to improve planning of distribution of the relief supplies, which is a critical issue in emergency preparedness and response. The authority officials construct their ...

• An application of unrelated parallel machine scheduling with sequence-dependent setups at Vestel Electronic 

  Sarıkaya, Merve Burcu (2017-08)

  Vestel Electronics produces LCD/LED televisions and has a significant market share in consumer electronics sector in Europe. TV manufacturing is planned based on a make-to order strategy, and Vestel uses 15 assembly lines ...

• Solving a modified TSP problem by a greedy heuristic for cost minimization 

  Çal, Murat (2017-06)

  Photographing a large area in an instant is only made possible by satellites. Satellites are able to help reducing the time required for the photographing/monitoring process, however, satellite images are not available all ...

• Facility location with supplier selection under quantity discount 

  Emirhüseyinoğlu, Görkem (2017-07)

  The purpose of this study is to identify the locations of distribution facilities and choose the suppliers in a two echelon system where items are purchased from suppliers under quantity discount policy and distributed to ...

• A location-routing problem for waste oil collection 

  Varandi, Fahriye Naderi (2016-06)

  This thesis is motivated by a real-world waste cooking oil collection system. Specifically, we focus on a biodiesel production company, which regularly collects waste cooking oil from di erent sources such as fast food ...

• Coordinated inventory planning for humanitarian relief agencies 

  Karaca, Meserret (2016-07)

  Pre-positioning relief supplies in strategic locations around the world is essential for effective disaster response, especially during the critical 72 hours immediately following the disaster. Most of the existing studies ...

• A mathematical model for customer lifetime value based offer management 

  Can, Zehra (2018-01)

  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 to ...

• 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 ...

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