https://hdl.handle.net/20.500.11857/4364 2026-06-02T21:58:49Z 2026-06-02T21:58:49Z Yılmaz, Hülya Yanık, Seda https://hdl.handle.net/20.500.11857/2835 2023-01-28T12:23:23Z 2020-01-01T00:00:00Z

Design of Demerit Control Charts with Fuzzy c-Means Clustering and an Application in Textile Sector Yılmaz, Hülya; Yanık, Seda Companies use process control to detect and prevent defects in production. One of the most commonly used technique is the control charts. To control multiple dimensions of quality on one control chart, multivariable control charts, control charts for attributes and demerit control charts are widely used. In this study, we use demerit control charts to monitor multiple defect types and propose to employ the fuzzy c-means method to cluster the defect types based on pre-specified criteria. The criteria are chosen to represent the severity of defect types and specified as (i) number of scraps, (ii) number of reworks and (iii) time of the rework. In order to test the proposed method, u and c attribute control charts and demerit control charts for six instances in a textile company are used and compared. It is observed that both the scrap and the repair rates are decreased when the proposed method of the demerit control chart is used.

2020-01-01T00:00:00Z Serdarasan, Şeyda Yılmaz, Hülya Doğan, Elif Büşra Koç, Bülent Kayır, Maide Havva Çatalyürek, Münevver Büşra https://hdl.handle.net/20.500.11857/2271 2023-01-28T12:17:09Z 2021-01-01T00:00:00Z

LOJİSTİK VE TEDARİK ZİNCİRİ ALANINDA TR DİZİN’DE İNDEKSLENEN ÇALIŞMALARIN BİBLİYOMETRİK ANALİZİ Serdarasan, Şeyda; Yılmaz, Hülya; Doğan, Elif Büşra; Koç, Bülent; Kayır, Maide Havva; Çatalyürek, Münevver Büşra Küresel tedarik zincirlerinin artan karmaşıklığı ve belirsizliği ile birlikte, lojistik ve tedarik zinciri yönetimi kavramları gitgide önem kazanmaktadır. Bu çalışmanın amacı, TR Dizin veri tabanında yer alan “lojistik” ve/veya “tedarik zinciri” alanda yapılan çalışmaların durumunun ortaya konmasıdı. Bu amaçla bibliyometrik analiz yöntemi kullanılmıştır. Analizler sonucunda, en sık kullanılan anahtar kelimenin lojistik, en fazla makale yayınlayan derginin Atatürk Üniversitesi İktisadi ve İdari Bilimler Dergisi, en fazla yayın yapan üniversitenin Dokuz Eylül Üniversitesi, en çok yayın yapan bölümün İşletme, en çok atıf alan derginin Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi olduğu görülmüştür. Çok yazarlı makalelerin çoğunlukta olması araştırma işbirliklerine işaret etmektedir. Analizlerin sonucunda Türkçe yazında lojistik ve tedarik zinciri alanının gelişmekte olduğu sonucuna varılmıştır.; The concepts of logistics and supply chain management are becoming progressively as the complexity of global supply chains increase. The aim of this study is to examine the articles in the TR Index database on “logistics” and/or “supply chain”. Bibliometric analysis was used to present the current situation of logistics and supply chain research area in Turkish literature. The analysis revealed that the most frequently used keyword is logistics, the journal with the highest number of articles is Atatürk University Journal of Economics and Administrative Sciences, the university with the highest number of publications is Dokuz Eylül University, the department with the highest number of articles is Business Administration and the most cited journal is Journal of the Faculty of Engineering and Architecture of Gazi University. The articles with two and more authors are in majority, which is an indication of research collaboration. Overall, it was concluded that the logistics and supply chain research area is still developing in the Turkish literature.

2021-01-01T00:00:00Z