Browsing by Author "Ekici, Ali"
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Modeling influenza pandemic and planning food distribution
Ekici, Ali; Keskinocak, P.; Swann, J. L. (Informs, 2014)Based on the recent incidents of H5N1, H1N1, and influenza pandemics in history (1918, 1957, and 1968) experts believe that a future influenza pandemic is inevitable and likely imminent. Although the severity of influenza ... -
Multi-compartment inventory routing problem with adjustable compartment sizes
Ölmez, Ömer Berk (2021-06-10)In this study, we focus on a problem where the supplier manages the customers’ in ventories and coordinates the distribution of multiple products to customers. Hereby the supplier can minimize the transportation costs by ... -
Neural network estimatorsfor optimal tour lengths of TSP instances with arbitrary node distributions
To achieve operational efficiency in logistics, we need to solve complex routing problems. Due to their complexity, these problems are often solved sequentially, i.e., using cluster-first route-second (CFRS) type frameworks. ... -
Open-end bin packing problem with conflicts
In this thesis study, we focus on a new variant of the famous Bin Packing Problem (BPP) called the Open-End Bin Packing Problem with Conflicts (OEBPPC) which combines the Open-End Bin Packing Problem (OEBPP) and the Bin ... -
Pricing decisions in a strategic single retailer/dual suppliers setting under order size constraints
Ekici, Ali; Özener, Başak Altan; Özener, Okan Örsan (Informa Group, 2016)In this paper, we study a duopolistic market of suppliers competing for the business of a retailer. The retailer sets the order cycle and quantities from each supplier to minimize its annual costs. Different from other ... -
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 ... -
Routing and inventory loading problem for heterogeneous vehicle fleet with compartments
Yılmaz, Türkay Umut (2018-05)This thesis focuses on multi compartment heterogeneous vehicle fleet routing problems for the case of incompatible products dedicated to separately within the compartments. In order to supply the different product demand ... -
Service level satisfaction during shortages for health networks: base stock inventory and transshipment policies
Bozkır, Cem Deniz Çağlar (2018-05)In this study, we consider a system of healthcare providers, which face the same uncertain supply disruptions (e.g., regional, nationwide, or worldwide drug shortages). Each hospital observes a stochastic demand and if ... -
Set-covering based heuristic approaches for the problems from the printing industry
In this thesis, we focus on two different planning production problems coming from the printing industry. The first problem is the label printing problem and the second one is a variant of the cover printing problem. In ... -
Single machine scheduling with sequence dependent setup times
Lefkur, Burak (2021-06-10)In this thesis, we study a single machine scheduling problem with sequence dependent setup times where the jobs are processed in shifts with constant length. There is a certain amount of time between each pair of consecutive ... -
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 ... -
A split delivery vehicle routing problem for daily tobacco delivery
One of the Turkey's largest cigarette manufacturer, located in Izmir, receives distributors' orders from all over Turkey every day. Processed and packed cigarettes are distributed to all distributors in different locations ... -
Supplier selection and order allocation in the presence of suppliers with exact annual capacity
Ekici, Ali; Özener, Okan Örsan; Elyasi, Milad (Inderscience Enterprises Ltd., 2021)In this paper, we focus on the supplier selection and order quantity allocation for a single retailer. The retailer orders a product from multiple suppliers with capacities, adds value to the product and fulfils the demand ... -
A syncronized routing problem for restoring inter-dependent infrastructure networks
Sevindik, Büşra (2018-05)Disasters may cause significant damages in lifeline infrastructure systems (such as gas, power, water) and lead to long-lasting failures. It is important to repair the damaged components and restore the affected infrastructures ... -
Transportation planning for the relief items distribution during an emergency
Çankaya, Emre (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 ... -
Variable-sized bin packing problem with conflicts and item fragmentation
Ekici, Ali (Elsevier, 2022-01)In this paper, we study the Variable-Sized Bin Packing Problem with Conflicts and Item Fragmentation (VSBPPC-IF) that has applications such as (i) the delivery planning of incompatible items using a fleet of heterogenous ...
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