GİYSİ ÜRETİM BANTLARINDAKİ DÜZENSİZLİKLERİN ANALİZİ

Yıl 2011, Cilt: 21 Sayı: 2, 189 - 193, 01.12.2011

Önder Yücel

Öz

Gerek hizmet gerekse üretim sektörlerinde kaynakların etkin kullanımı büyük önem taşımaktadır. Üreti,m sistemlerinde karşılaşılan birtakım karışıklıklar üretim performanslarında negatif etki yaratarak çeşitli kayıplara neden olabilmektedir. Bu çalışmada konfeksiyon üretiminde ortaya çıkan üretim düzensizlikleri ve bunların üretim verimliliğine olan etkileri incelenmiştir. Bu amaçla İzmirde faaliyet gösteren üç ayrı konfeksiyon işletmesinin giysi üretim hattında durum analizi gerçekleştirilmiştir. Çalışmada REFA tarafından önerilen rastsal dağılım zamanı metodu kullanılmıştır. Ölçümler tüm operasyonları temsil edecek şekilde seçilmiş olan sekiz ayrı dikiş makinesinden alınmıştır. Çalışmada her bir işletmeden 10800 dakikalık üretim zamanın verileri toplanmıştır. Giysi üretim hatlarından elde edilen verilere göre en çok görülen düzensizlikler, bekleme zamanları, dikim hatalarının düzeltilmesi ve makine arızaları olarak belirlenmiştir. Bu düzensizliklerin üretim verimliliğini önemli ölçüde azalttığı görülmüştür

Anahtar Kelimeler

Düzensizlik, Bekleme zamanı, Düzensizlik yönetimi, Etkili yönetim

ANALYZING THE DISTURBANCES IN GARMENT MAKING LINES

Öz

Effective use of production resources is of big importance for both production and serving sectors. Disturbances of manufacturing systems have a negative impact on the performance of production and result in productivity losses. Aim of this study is to analyze the causes of disturbances and to investigate the effects of production disturbances to efficiency of manufacturing times. For this purpose, three case studies from apparel plants which are founded in city of Izmir were examined. Data of the study were obtained using the distribution time method which is divided according to random time plan. The method used in this study is offered by The REFAAssociation for Work Design/Work Structure, Industrial Organization and Corporate Development. Eighteen different machines operating in garment making lines of the plants were used in time measurement. Selected sewing machines should represent all the operations in production was targeted. These sewing machines also represent workstations to collect data for the study. In this study, production period which is 10800 minute was used for each plant According to the results obtained, waiting times, correcting the seam faults and breakdown of machines are the major causes of disturbance. These disturbances reduce the efficiency of manufacturing time and may upset production schedules during execution

Anahtar Kelimeler

Disturbance, Waiting Time, Disturbance Management, Effective Manufacturing

Kaynakça

• 1. Stahre, J., “Disturbance Handling in Continuous Development of Manufacturing Systems”, Proper Project Proposal-Area of Manufacturing Systems, (1999) Available from: http://www.ege.edu.tr/
• 2. Ingemansson, A., and Bolmsjö, G.S., “Improved Efficiency with Production Disturbance Reduction in Manufacturing Systems Based on Discrete-Event Simulation”, Journal of Manufacturing Technology Management, Volume 15, No 3, (2004) pp.267-279.
• 3. Bellgran, M., and Aresu, E., “Handling Disturbance in Small Volume Production” Robotics and Computer Integrated Manufacturing, Volume 19, (2003) pp.123-134.
• 4. Kuivanen, R., “Disturbance Control in Flexible Manufacturing” International Journal of Human Factors in Manufacturing”, Volume 6, (1996) pp.41-46.
• 5. Schumacher, J., “A Disturbance Management Approach to Improving the Performance of Batch Process Operations”, Ph D Thesis, Delft University of Technology, Faculty of Technology, (1999) .
• 6. Mattson, J. and McFarlane, D., “Assessing the Responsiveness of Existing Production Operations”, International Journal of Operation & Production Management, Volume 19, No 8, (1999) pp 69-76.
• 7. Barroso, M.P. and Wilson, J.R., “Human Error and Disturbance Occurrence in Manufacturing Systems: Toward the Development of an Analytical Framework” Human Factors and Ergonomics in Manufacturing, Volume 9, No 1, September, (1999), pp.87-104.
• 8. Frizelle, G., et al,“Disturbance “Measurement in Manufacturing Production Systems”, In Proceedings of ASI, Bremen, Germany (1998).
• 9. Fjallström, S. and Bellgran, M., “Communication and Co-Operation for Flexible and Robust Production Systems”, Sixteenth Annual Conference of POM, Chicago, IL, April 29-May 2, (2005).
• 10. Chong, C.S., Appa, I.S. and Gay, R., “Simulation-Based Scheduling for Dynamic Discrete Manufacturing Systems” Proceedings of the Winter Simulation Conference, (2003), pp.1465-1473.
• 11. Yin, R.K., Case Study Research, Thousand Oaks, Sage Publications, Inc (1994).