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Browsing by Author "Hoşer, Deniz"

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    Article
    Citation - WoS: 5
    Citation - Scopus: 10
    A new warehouse design problem and a proposed polynomial-time optimal order picking algorithm
    (GAZI UNIV FAC ENGINEERING ARCHITECTURE, 2018) Omer Ozturkoglu; Deniz Hoser; Hoşer, Deniz; Öztürkoğlu, Ömer
    In this study we propose a new design problem that relates to orientation of cross aisles in warehouses. In this problem the main orthogonal cross aisle which is very common to be seen in warehouses to facilitate travel between locations is planned to be designed as discrete manner such as tunnels along picking aisles. Hence the problem of locating these tunnels along picking aisles so as to increase efficiency of order picking operations which is one of the most costly and the most related operations with the order delivery time in warehouses is propounded. Additionally we develop a new dynamic programming based polynomial time algorithm to calculate optimal length of order picking tour in this new design problem. Hence this algorithm provides very quick solutions even for large pick list sizes. The computational performance of this algorithm is compared with Held-Karp branch and bound algorithm which is a well-known algorithm for travelling salesman problem. Last we solve an example problem and explain how the algorithm is implemented to generate optimal tour.
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    Master Thesis
    Sipariş toplama operasyonları için değiştirilmiş iki bloklu depolar
    (2018) Hoşer, Deniz; Öztürkoğlu, Ömer
    Bu çalışma, sipariş toplayıcının depo içerisindeki seyahatinin en fazla zaman alan aktivite olduğu depolarda çalışanın seyahat mesafesinin en küçükleyecek yenilikçi depo tasarımları geliştirmeyi amaçlamaktadır. Bu nedenle, orta ana koridorun segmentlere bölündüğü ve herbir segmentin (tünelin) toplama koridorları boyunca birbirinden bağımsız olarak yerleştirilebildiği yeni bir depo tasarım problemi ele alınmıştır. Tünellerin sipariş toplama tur uzunluğunu uzun vadede en küçükleyecek en iyi lokasyonlarını bulmak için Harmoni arama sezgiseli seçilmiştir. Ayrıca, verilen sipariş setleri ve tünel lokasyonları için en küçük tur uzunluğunu hesaplayan yeni bir sipariş toplama algoritması önerilmiş olup algoritmanın hesaplama karmaşıklığının ise koridor sayısı ve toplanacak parça adeti ile lineer ilişkili olduğu gösterilmiştir.
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