Browsing by Author "Yanıkoğlu, İhsan"
Now showing items 1-20 of 25
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An adaptive large neighborhood search for the multi-compartment inventory routing problem
Gültekin, Ceren (2021-06-10)In this thesis study, we concentrate on an inventory routing problem with a fleet of multi-compartment vehicles which enables the distribution of different products to customers on a delivery route. Using separate compartments ... -
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 ... -
A decomposition-based metaheuristic approach for solving the rapid needs assessment routing problem
Mıhçıoğlu, Yurtsev (2021-01-18)This study proposes a decomposition-based tabu search algorithm for a multi-cover routing problem (MCRP), which aims to classify and evaluate the impacts of the disaster in different sites and the needs of different community ... -
Economic lot sizing problem with tank scheduling
Dereli, Meryem Merve (2021-08)In this study, we consider an Economic Lot sizing Problem with Tank Scheduling (ELSTS). The problem is a real-world problem, which is generally found in fermented beverage and food facilities. A facility might produce an ... -
An exact approach to maximize area under receiver operator characteristic curve for multi-instance learning
Atasoy, Gizem (2018-08)The purpose of this study is to solve the multi-instance classi cation problem by directly maximizing the area under Receiver Operating Characteristic (ROC) curve (i.e., AUC). We derive a mixed integer linear programming ... -
Finding the determinants of player market value in association football using FIFA video game data
Futbol, son onyıllarda dünyadaki en popüler sporlardan biri haline gelmiştir. Artan popülerliği ile birlikte futbol, büyüyen milyar dolarlık bir pazar halini almıştır. Büyük Avrupa liglerindeki üst düzey oyuncuların ... -
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 ... -
An integrated post-disaster assessment routing problem for collecting damage information with drones
In this study, we focus on post-disaster damage assessment operations supported by a set of drones when the disaster-affected area is divided into grids, and grids are clustered based on their attributes. We propose a ... -
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 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 ... -
Mathematical modeling and math heuristic approach for shift selection, lot sizing and worker assignment problem of Vestel
The simultaneous lot sizing and scheduling studies do not implement a worker assignment problem in the literature. This study provides a solution for worker assignment problems with overtime constraints of the Government. ... -
A mathematical modelling approach for dled TV panel design
Kurt, Olkan (2019-06)The aim of this study is to increase the luminance performance of direct light emitting diodes (DLED) televisions through case design improvement. We first gather luminance measurements of several regions of active area ... -
Minimizing warpage using taguchian methodology and robust optimization
Okçuoğlu, Serkan (2018-04)Injection moulding, which is considered to be one of the most efficient plastic raw material processing methods in plastic industry regarding to its high production rate when manufacturing parts with complex geometries are ... -
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 ... -
A multistage scenario optimization procedure for capacity planning in TV production final assembly lines
Vestel Electronics is a large-scale TV producer that has an important share in the European television market. High End Factory, where Vestel assembles 20 different TVs in size, consists of 14 final assembly lines. High ... -
Nonidentical parallel machine scheduling with time-dependent deterioration of jobs
We consider scheduling of deteriorating jobs on nonidentical parallel machines where the objective is to minimize mean flow time while ensuring the average value (i.e., quality) of processed jobs on machines exceeds a ... -
A practical guide to robust optimization
Gorissen, B. L.; Yanıkoğlu, İhsan; Hertog, D. den (Elsevier, 2015-06)Robust optimization is a young and active research field that has been mainly developed in the last 15 years. Robust optimization is very useful for practice, since it is tailored to the information at hand, and it leads ... -
Robust dual response optimization
Yanıkoğlu, İhsan; Hertog, D. den; Kleijnen, J. P. C. (Taylor & Francis, 2016)This article presents a robust optimization reformulation of the dual response problem developed in response surface methodology. The dual response approach fits separate models for the mean and the variance, and analyzes ... -
A robust optimization approach for humanitarian needs assessment planning under travel time uncertainty
Koyuncu, Burcu Balçık; Yanıkoğlu, İhsan (Elsevier, 2020-04-01)We focus on rapid needs assessment operations conducted immediately after a disaster to identify the urgent needs of the affected community groups, and address the problem of selecting the sites to be visited by the ... -
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 ...
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