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Birliktelik Kısıtları Altında Montaj Hattı Dengeleme Problemi İçin Bir Çözüm Yaklaşımı Önerisi ve Bir İşletmede Uygulama

A Solution Approach to Assembly Line Balancing Problem With Task Related Constraints and an Application At An Enterprise

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Abstract (2. Language): 
Occasionally certain tasks in an assembly line balancing problem are required to be kept together due to some specific reasons. These tasks are attained to the same work stations. Such problems are called as 'Assembly Line Balancing Problem with Task Related Constraints (ALBTRC). Certain situations like awkward product construction, simultaneous operations or specific requirements leading to zoning and positional constraints like utilization of common resources as tools, jigs and fixtures are implemented thanks to these supplementary constraints. Additionally, materials handling and tooling costs, distances, set-up and lead times are also reduced. Literature on ALBTRC seems quite rare compared to Classical Line Balancing papers, although ALBTRC is one of the common real life balancing problems. This study aimed to develop and implement a novel line balancing method for a manufacturing concern where known methods are impractical to employ due to some specific positional constraints. 'Largest Candidate Method' known as a simple but effective tool is modified for this purpose first. Then a thorough 'method and time study' is conducted to get the necessary data to utilize that method. As a result, more efficient alternatives are generated and presented to decision maker.
Abstract (Original Language): 
Montaj Hattı Dengelemesinde, -çeşitli nedenlerle- belli iş elemanlarının birbirinden ayrılmaması ve aynı istasyona atanması istenebilir. Bu tür problemler, 'Birliktelik Kısıtları Altında Montaj Hattı Dengeleme (BKAMHD) Problemi' olarak tanınmaktadır. Bu birliktelik kısıtı sayesinde, havaleli ürün imali, birlikte işlem görme gereği gibi özel isteklerden veya takım-kolaylık benzeri kaynakların ortak kullanımı düşüncesinden kaynaklanan 'konum ve bölge kısıtları' da karşılanabilmektedir. Bu tür hatlarda ayrıca, malzeme aktarma, takım ve kolaylık maliyetleri, yürüyüş mesafeleri, ayar süreleri ile tedarik süreleri de azalmaktadır. Uygulamada BKAMHD yapısındaki problemlerle yaygın olarak karşılaşılmasına karşın, bunlar üzerinde yapılan çalışmaların klasik montaj hattı dengeleme problemi ile ilgili yayınlara göre daha az olduğu görülmektedir. Bu çalışmanın amacı, özel konum kısıtları dolayısıyla-, bilinen Montaj Hattı Dengeleme yöntemlerinin uygulanamadığı büyük ölçekli bir montaj hattı için uygun bir hat dengeleme yöntemi geliştirmek ve bu yöntem ile söz konusu hattı dengelemek olmuştur. Çalışmanın başında, bu problemin çözümünde kullanılabilecek basit fakat etkili bir yol olarak tanınan 'En Büyük Aday' algoritmasında bazı değişiklikler yapılarak yeni bir yöntem geliştirilmiştir. Bu yöntemin uyarlanabilmesi için de montaj işlemlerinin yapıldığı atölyede çok yoğun bir metot ve zaman etüdü çalışması yürütmek gerekmiştir. Bu çalışma sonucunda derlenen verilerin geliştirilen yönteme uyarlanması sonucunda türetilen seçenekler değerlendirilerek karar vericiye sunulmuştur.
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