Demirel, Ömer Fahrettin
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Yönetim Bilimleri Fakültesi, İşletme Bölümü
Küresel rekabete ayak uydurmak ve sürdürülebilir olmak isteyen tüm şirketler ve kurumlar, değişimi doğru bir şekilde yönetmek, teknolojinin gerekli kıldığı zihinsel ve operasyonel dönüşümü kurumlarına hızlı bir şekilde adapte etmek zorundadırlar.
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Ömer Fahrettin Demirel
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Bilgisayar Bilimleri, Mühendislik, İşletme ve Ekonomi, Matematik, Bilim ve Teknoloji
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Yayın Assembly line balancing by using axiomatic design principles: An application from cooler manufacturing industry(Universidad Politecnica de Valencia, 2020) Zaim, Selim; Demirel, Ömer Fahrettin; Zaim, Selim; Demirel, Ömer Fahrettin; Yılmaz, Ömer Faruk; Demirel, Ömer Fahrettin; Zaim, Selim; Yönetim Bilimleri Fakültesi, İşletme Bölümü; Yönetim Bilimleri Fakültesi, İşletme BölümüThe philosophy of production without waste is the fundamental belief behind lean manufacturing that should be adopted by enterprises. One of the waste elimination methods is assembly line balancing for lean manufacturing, i.e. Yamazumi. The assembly line balancing is to assign tasks to the workstations by minimizing the number of workstations to the required values. There should be no workstation with the excessively high or low workload, and all workstations must ideally work with balanced workloads. Accordingly, in this study, the axiomatic design method is applied for assembly line balancing in order to achieve maximum output with the installed capacity. In order to achieve this aim, all improvement opportunities are defined and utilized as an output of the study. Computational results indicate that the proposed method is effective to reduce operators’ idle time by 12%, imbalance workload between workstations by 38%, and the total number of workers by 12%. As a result of these improvements, the production volume is increased by 23%.Yayın Intermittent demand forecasting: A guideline for method selection(Springer, 2020) Kaya, Gamze Ogcu; Şahin, Merve; Demirel, Ömer Fahrettin; Demirel, Ömer Fahrettin; Şahin, Merve; Yönetim Bilimleri Fakültesi, İşletme BölümüIntermittent demand shows irregular pattern that differentiates it from all other demand types. It is hard to forecasting intermittent demand due to irregular occurrences and demand size variability. Due to this reason, researchers developed ad hoc intermittent demand forecasting methods. Since intermittent demand has peculiar characteristics, it is grouped into categories for better management. In this paper, specialized methods with a focus of method selection for each intermittent demand category are considered. This work simplifies the intermittent demand forecasting and provides guidance to market players by leading the way to method selection based on demand categorization. By doing so, the paper will serve as a useful tool for practitioners to manage intermittent demand more easily.