Department of Industrial Engineering

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Azizoğlu, Meral (75)
Köksal, Gülser (54)
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İyigün, Cem (43)

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Management Science and Operations Research (136)
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Master Thesis (651)
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Recent Submissions

The min-max order picking problem in synchronised dynamic zone-picking systems
Saylam, Serhat; Çelik, Melih; Süral, Haldun (2022-04-01)
In both manual and automated warehouses, a combination of efficient zoning and picker routing plays an important role in improving travel time, congestion, and system throughput. This paper considers the order picker routi...
Intermodal transportation in humanitarian logistics with an application to a Turkish network using retrospective analysis
ERTEM, MUSTAFA ALP; Akdoğan, Muharrem Altan; Kahya, Melike (2022-04-01)
In the event of disruptions in a transportation network following a disaster, humanitarian organizations find it challenging to provide basic requirements for beneficiaries. Demand may be met using intermodal transportatio...
Product-line planning under uncertainty
Karakaya, Şakir; Köksal, Gülser (2022-02-01)
This study addresses a multi-period product-line-mix problem considering product interdependencies and uncertainties regarding price, demand, production cost, and the cannibalization effect of new products. The problem is ...
Two Dimensional Cutting Stock Problem With Multiple Stock Sizes
Ayasandır, Umutcan; Azizoğlu, Meral (2022-01-01)
Two dimensional cutting stock problem with multiple stock sizes
Ayasandır, Umutcan; Azizoğlu, Meral (2022-01-01)
A Multi-Objective Mathematical Model for Level of Repair Analysis with Lead Times and Multi-Transportation Modes
Bicakci, Ismail; İÇ, YUSUF TANSEL; Karasakal, Esra; DENGİZ, BERNA (2022-01-01)
In the event of failure of the product, level of repair analysis (LORA) is used to determine (1) whether the defective component should be discarded or repaired and (2) where this repair is made. In the literature, these r...
Vehicle routing for aerial surveillance with a homogeneous fleet
Tarakçı, Koray; Karasakal, Esra; Karasakal, Orhan; Department of Industrial Engineering (2021-12-10)
In this study, we develop models and solution approaches for planning the surveillance mission of a homogeneous fleet of Unmanned Aerial Vehicles (UAVs). Predefined areas are to be observed while satisfying a minimum proba...
Bicriteria scheduling of a material handling robot in an m-machine cell to minimize the energy consumption of the robot and the cycle time
Gultekin, Hakan; Gürel, Sinan; Taspinar, Rabia (2021-12-01)
This study considers a flowshop type production system consisting of m machines. A material handling robot transports the parts between the machines and loads and unloads the machines. We consider the sequencing of the rob...
Servitization as an alternative business model and its implications on product durability, profitability & environmental impact
Kanatlı, Mehmet Ali; Karaer, Özgen (2021-11-01)
Servitization is the activity of selling the services provided by the product rather than the product itself. It is a business model that might be environmentally superior to conventional selling. Servitization promises ac...
A comparison of pure manufacturing and hybrid manufacturing–remanufacturing systems under carbon tax policy
Alegoz, Mehmet; Kaya, Onur; Bayındır, Zeynep Pelin (2021-10-01)
Collection and remanufacturing of used products can be considered as one of the options to improve the sustainability of a manufacturing system. In this study, we focus on production and sustainability level decisions in p...
Development of a new hesitant fuzzy ranking model for NTMP ranking problem
ATALAY, KUMRU DİDEM; İÇ, YUSUF TANSEL; KEÇECİ, BARIŞ; YURDAKUL, MUSTAFA; Boran, Melis (2021-10-01)
Nontraditional manufacturing processes (NTMPs) bring the processing capabilities such as machining high strength and hard materials with desired accuracies and surface finish to the manufacturing companies. Therefore, ther...
A New Multi-Echelon Repair Network Model with Multiple Upstream Locations for Level of Repair Analysis Problem
Bicakci, Ismail; İÇ, YUSUF TANSEL; Karasakal, Esra; DENGİZ, BERNA (2021-10-01)
Level of repair analysis (LORA) determines (1) the best decision during a malfunction of each product component; (2) the location in the repair network to perform the decision and (3) the quantity of required resources in ...
Extending an outranking multiple criteria decision making method to differentiate gain and loss
Şentürk, Hazel; Karasakal, Esra; Karasakal, Orhan; Department of Industrial Engineering (2021-9-10)
In this study, the integration of Prospect Theory into ranking and sorting methods based on the dominance relations is studied. The well-known multi-criteria ranking method PROMETHEE and the well-known multi-criteria sorti...
Energy Efficient Scheduling in Flow-shop and Parallel Machine Robotic Cells
Aydoğan, Çiya; Gürel, Sinan; Department of Industrial Engineering (2021-9-10)
Robotic cell scheduling studies mostly focus on increasing the throughput of the cell. Therefore, those studies consider cycle time or makespan minimization objectives. However, energy-efficient and environmentally sensiti...
An integrated cutting stock and lot sizing problem
Şanan, Ayşe Burcu; Azizoğlu, Meral; Köksalan, Murat; Department of Industrial Engineering (2021-9)
In this thesis, we consider an integrated two dimensional cutting stock and lot sizing problem arising in an aircraft manufacturing plant. The items are to be cut from steel panels of identical size to satisfy all periodic...
Short-Term Flood Control and Long-Term Energy Maximization in Multi-reservoir Systems Using Improved Particle Swarm Optimization
Guvengir, Umut; Savaşaneril Tüfekci, Seçil; Altan Sakarya, Ayşe Burcu; Buhan, Serkan (2021-09-01)
In this study, a model is developed for short-term flood control of a complex multi-reservoir system located on one of the largest basins in Turkey. The managing body of the reservoirs requires that short-term real-time fl...
Dimension reduction for tree-structured data
Durak, Erdinç; Tural, Mustafa Kemal; İyigün, Cem; Department of Industrial Engineering (2021-9)
Statistical analysis of tree-structured data is one of the exciting research areas with expanding application areas. In classical data analysis, the data objects are points in the Euclidean space, whereas they are trees in...
Managing word-of-mouth with capacity allocation and advertisement
Dipkaya, Asya; Batun, Sakine; Çavdar, Bahar; Department of Industrial Engineering (2021-9)
We study the advertising and capacity decisions of a service firm under endogenous demand and multiple time periods. Consumers are exposed to two types of information: experiences of other consumers regarding fill rate of ...
Pricing with delivery time information sharing decisions in service systems
Karakaya, Sırma; Savaşaneril Tüfekci, Seçil; Serin, Yaşar Yasemin (2021-09-01)
We study the pricing problem of a service provider who informs arriving customers about the anticipated delivery times. Besides quoting prices, the provider decides on the amount of delivery time information to be revealed...
Multivariate quality loss function cost parameter estimation
Köksal, Gülser; Dolgun, Leman Esra (2021-08-23)
In this study, we consider estimating the cost matrix parameters of the multivariate quality loss function which is commonly used in product and process design parameter optimization. Multivariate quality loss functions co...
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