Journals / Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2026 / Cilt: 28 Sayı: 2

A simulation study on the planning of project-specific material arrivals in project-based manufacturing

Proje bazlı üretimde kesin kaynak malzemelerin geliş zaman planlamalarına yönelik benzetim çalışması

Emre Uğurlu(BALIKESİR ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ)0009-0008-7910-0843
Gülşen Aydın Keskin(BALIKESİR ÜNİVERSİTESİ)0000-0001-6639-1882
Pages
996–1013
Publication Date
2026-07-31
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The results indicate that the waiting times of project-specific materials were improved by up to 42%.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, a simulation model is proposed for planning the arrival times of project-specific materials that can only be used within a particular project and cannot be utilized in other projects in a transformer manufacturing company.
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Key Findings & Data:Such materials may lead to problems arising from storage space constraints and increased costs when procured too early due to their sensitivity to design revisions and the risk of becoming scrap.
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Conclusion & Impact:The results indicate that the waiting times of project-specific materials were improved by up to 42%.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Benzetim · Arena · sipariş planlaması

Abstract

In this study, a simulation model is proposed for planning the arrival times of project-specific materials that can only be used within a particular project and cannot be utilized in other projects in a transformer manufacturing company. Such materials may lead to problems arising from storage space constraints and increased costs when procured too early due to their sensitivity to design revisions and the risk of becoming scrap. Conversely, late delivery of materials can cause production delays, which in turn leads to a loss of reliability. In order to establish a balance between these two factors, the effects of different ordering times on production durations and material waiting times were examined. The developed model incorporates variables such as revision probabilities, quality-related issues, and uncertainties in supply lead times. The results indicate that the waiting times of project-specific materials were improved by up to 42%. Accordingly, cost savings of 23.4 million TRY were achieved by reducing resources allocated due to early ordering, while an additional 40.8 million TRY resulted from shorter inventory holding times. Scenario analyses reveal that the waiting times of project-specific materials in inventory can be reduced without negatively affecting production processes. Ultimately, the findings support the applicability of the developed simulation model as a decision support tool for project-based manufacturing enterprises.

Özet

Bu çalışmada, transformatör üretimi yapılan bir işletmede sadece belirli bir projede kullanılabilen ve diğer projelerde değerlendirilemeyen, projeye özel (kesin kaynak) malzemelerin geliş zamanının planlanmasına yönelik bir benzetim modeli önerilmektedir. Bu tür malzemeler, tasarım değişikliklerine duyarlılıkları ve hurdaya çıkma riskleri nedeniyle erken tedarik edildiğinde depolama alanı kısıtından kaynaklı sorunlara ve maliyet artışına, geç tedarik edildiğinde ise üretim gecikmelerine ve buna bağlı olarak güvenilirlik kaybına yol açabilmektedir. Çalışmada, bu iki faktör arasındaki dengeyi kurabilmek amacıyla farklı sipariş verme zamanlarının üretim süreleri ve malzeme beklemeleri üzerindeki etkileri incelenmiştir. Model, revizyon olasılıkları, kalite problemleri ve tedarik süresi belirsizlikleri gibi değişkenleri içermektedir. Elde edilen sonuçlara göre kesin kaynak malzemelerin bekleme sürelerinde %42’ye kadar iyileştirme sağlanmış ve buna bağlı olarak erken sipariş kaynaklı şirketin ayırdığı kaynaklardan 23,4 milyon TL, malzemelerin stokta bekleme sürelerinin kısaltılmasından ise 40,8 milyon TL kar elde edilmiştir. Senaryo analizleri, üretim süreçlerini etkilemeden kesin kaynak malzemelerinin stokta bekleme sürelerinin azaltılabileceğini ortaya koymaktadır. Ulaşılan sonuçlar, geliştirilen benzetim modelinin proje bazlı üretim yapan işletmelerde karar destek sistemi olarak uygulanabilirliğini desteklemektedir.

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Cite This Article

Uğurlu, E., Keskin, G. A., Ocaktan, M. A. B. (2026). A simulation study on the planning of project-specific material arrivals in project-based manufacturing. Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Cilt: 28 Sayı: 2, 996–1013. https://doi.org/10.25092/baunfbed.1914696

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