Simulation Model of Outsourcing Decision for Tyre Rim Assembly Operation

Abstract

The decision of outsourcing has been one of the critical issues in organization management. The main purpose of outsourcing is often reducing the costs, focusing on the core business, solving capacity problems, improving service quality, and accessing to intellectual capital. In cases where just in time delivery required or high logistic costs occurred, global outsourcing has been replaced by suppliers that are locally close to manufacturer, in automotive logistic industry. In this article, a simulation study has been carried out to make the decision of assembly operation insourcing or outsourcing for tyre and rim parts which have high transportation cost due to high volume. Utilizing the simulation model and experimental design, the best scenario has been determined to reduce the work in process inventory between outsource firm - manufacturer and appropriate values have been obtained for delivery frequency, delivery quantity and number of employees. The contributions of the article to the literature can be considered in two titles. The first one is the detailed explanation of the methodology that might be followed, if the outsourcing decision is made with simulation techniques and experimental design. The second one is demonstration of applicability of the method by obtained results using masked production data for tyre-rim assembly

Keywords

• Tyre-Rim Assembly
• Simulation
• Design of Experiment

LASTİK JANT BİRLEŞTİRME OPERASYONU İÇİN DIŞ KAYNAK KULLANIM KARARI BENZETİM MODELİ

Abstract

İşletmelerde dış kaynak kullanım (outsourcing) kararı, organizasyon yönetimindeki kritik konularından biridir. Dış kaynak kullanımının ana amacı, çoğu zaman maliyet düşürmek, ana işe odaklanmayı sağlamak, kapasite problemlerini çözmek, servis kalitesini arttırmak, entelektüel sermayeye erişebilmektir. Otomotiv üretim endüstrisinde ise küresel dış kaynak kullanımı, tam zamanında sevkiyat yapılması gereken durumlarda ya da lojistik maliyetlerinin yüksek olduğu durumlarda, yerini üretici firmaya yakın bölgelerdeki tedarikçilere bırakmaktadır. Bu makalede de, hacmi gereği taşıma maliyetleri yüksek olan lastik ve jant parçalarının birleştirme operasyonunun üretici firma içinde ya da dış kaynak kullanarak yapma kararının verilebilmesi için simülasyon çalışması yapılmıştır. Simülasyon modeli ve deneysel tasarım ile tedarikçi ile üretici arasındaki ara stok miktarını düşürebilecek en iyi senaryo belirlenmiş, taşıma sıklığı, taşıma miktarı, çalışan sayısı gibi faktörler için en uygun değerlerler elde edilebilmiştir. Makalenin literatüre katkısı iki başlıkta derlenebilir. İlki, dış kaynak kullanımı kararının simülasyon teknikleri ve deneysel tasarım ile verilmesi durumunda izlenebilecek yöntemin ayrıntılarıyla aktarılmasıdır. İkincisi ise, lastik-jant birleştirme operasyonu için, gerçek üretim verileriyle elde edilen sonuçlarla yöntemin uygulanabilirliğinin ortaya koyulabilmesidir.

Keywords

• Lastik-Jant Birleştirme
• benzetim
• deneysel tasarım

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