Seru üretim sistemi ile montaj hattı üretim sisteminin farklı işgücü yetkinlik seviyelerinde istatistiksel olarak karşılaştırılması

Öz

Seru Üretim Sistemi, Japon imalat endüstrisinde ortaya çıkmış bir hücresel üretim sistemidir. Seru Üretim Sistemleri montaj hattının verimlilik ve atölye üretimin esneklik özelliklerini bir arada değerlendirmektedir. Seru yapısında görevli işgücünün çapraz eğitimli ve farklı operasyonlar için gelişmiş yetkinlik seviyelerinde bulunması Seru Üretim Sistemlerinin işlerlik kazanması için gerekli görülmektedir. Bu çalışmada, Seru Üretim Sisteminde görevlendirilmiş farklı işgücü yetkinlik seviyelerindeki çalışanların üretim miktarı, geleneksel montaj hattı üretim sisteminde görevli olmaları sırasında ortaya koydukları üretim miktarı ile karşılaştırılmaktadır. Seru Üretim Sistemi için çalışan yetkinliğinin önemine dikkat çekmek amacıyla yapılan bu çalışmada ürünün tamamını üretmeye yetkin olan çalışanların değişen yetkinlik seviyeleri ile toplam üretim çıktısını etkileme durumları araştırılmıştır. Öncelikle, literatürde iyi bilinen test problemleri kullanılarak geleneksel montaj hattı üretim miktarları, tamsayılı programlama yöntemiyle hesaplanmıştır. Daha sonra, bu test problemleri, farklı yetkinlik seviyelerine sahip işçiler tarafından çalıştırılan serulara dönüştürülerek ilgili işlem süreleri hesaplanmış ve üretim miktarları bulunmuştur. Elde edilen sonuçlar, eşlenik t testi ile kıyaslanmış ve Seru Üretim Sistemlerinin, geleneksel montaj hattı üretim sistemlerine nazaran daha fazla üretim miktarı sağladığı görülmüştür. Ayrıca, montaj hattı ve seru üretim yöntemlerinden elde edilen çıktı miktarlarının farklı test problemleri ve farklı işçi yetkinlik düzeylerinden etkilendiğini göstermek amacıyla 2-yönlü varyans analizi çalışması yapılmıştır.

Anahtar Kelimeler

• Seru üretim sistemi
• montaj hattı
• işgücü yetkinliği
• istatistiksel karşılaştırma

Statistical comparison of seru production system and assembly line production system at different labor competence levels

Öz

The Seru Production System is a cellular production system that originated in Japanese manufacturing industry. Seru Production Systems evaluates the efficiency of assembly line and the flexibility of job-shop production together. Workers must be cross-trained and have advanced competency levels for different operations in Seru Production Systems. In this study, the employees' production rate at different labor competency levels assigned in the Seru Production System is compared with production rate they put forward while working in traditional assembly line production system. This paper examines various competence levels of employees capable of producing the entire product and their effects on total production output. First, traditional assembly line production rates were calculated via integer programming using well-known test problems. Then, these test problems were converted into serus run by workers with different competence levels, relevant operation times were calculated, and production rates were obtained. Paired t test is used to compare the production rates. The results show that Seru Production Systems provided more production than traditional assembly line. Moreover, a 2-way analysis of variance is applied to show that the output rates obtained from the assembly line and traditional production methods are affected by different test problems and different worker competency levels.

Anahtar Kelimeler

• Seru production system
• assembly line
• workforce competence
• statistical comparison

Kaynakça

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