Demirel, Ömer Fahrettin

Profil fotoğrafı
 E-posta Adresi
ofahrettin.demirel@ihu.edu.tr
ORCID Profili
0000-0002-2803-8911
WoS Profili
EQY-1327-2022
Scopus Profili
6508013954
YÖK Araştırmacı Profili
AA9C4AE83462094A
TR-Dizin Profili
553452
SOBİAD Profili
163516
Web Sitesi
akademik.ihu.edu.tr/tr/ofahrettin-demirel

Araştırma projeleri

Organizasyon Birimleri

Organizasyon Birimi Logosu
Organizasyon Birimi
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.

Adı Soyadı

Ömer Fahrettin Demirel

İlgi Alanları

Bilgisayar Bilimleri, Mühendislik, İşletme ve Ekonomi, Matematik, Bilim ve Teknoloji

Kurumdaki Durumu

Aktif Personel

Filtreler

2018 - 20203
Filtreleri Sıfırla

Ayarlar

Arama Sonuçları

Listeleniyor 1 - 3 / 3
  • Küçük Resim
    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 Bölümü
    The 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%.
  • Küçük Resim
    Yayın
    An ANP and fuzzy TOPSIS-based SWOT analysis for Turkey's energy planning
    (Elsevier, 2018) Zaim, Selim; Demirel, Ömer Fahrettin; Delen, Dursun; Ervural, Beyzanur Çayır; Aydın, Zeynep; Yönetim Bilimleri Fakültesi, İşletme Bölümü
    Energy planning involves a perpetual process of reevaluating alternative energy strategies. Authorities responsible for energy planning and management have to adjust their strategies according to new and improved alternative solutions based on the sustainability criteria. In this study, we propose an integrated hybrid methodology for the analysis of Turkey’s energy sector using Strengths, Weaknesses, Opportunities, and Threats (SWOT) analysis, Analytic Network Process (ANP) process, and weighted fuzzy Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) to formulate and holistically analyze the energy strategy alternatives and priorities. The methodology proposed in this study allowed identifying the relevant criteria and sub-criteria using a SWOT analysis. Then, ANP approach, which is one of the popular multi-criteria decision making (MCDM) methods, is employed to determine the weights of each SWOT factors and sub-factors. Finally, fuzzy TOPSIS methodology is conducted to prioritize alternative energy strategies. We discuss the obtained results for the development of long-range alternative energy strategies. The results showed that turning the country into an energy hub and an energy terminal by effectively using the geo-strategic position within the framework of the regional cooperation is the most important priority. On the other hand, using the nuclear energy technologies within the energy supply strategies found to be the least favored priority.
  • Küçük Resim
    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 Bölümü
    Intermittent 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.