HYBRID ANALTYIC SIMULATION APPROACH FOR PRODUCTION PLANNING PROBLEM WITHIN SUPPLY CHAIN NETWORK)

Öz

As the industrial environment becomes more competitive, supply chain management (SCM) has received much more attention in the literature. The supply chain (SC) can be defined as an integrated structure involving the procurement, production, storage, distribution and control of goods. This paper addresses the procurement and production planning problem in a supply chain system that involves the supply of various components from a set of suppliers and production of end products within the plant. A linear programming model is proposed to describe the problem, where multiple components can be assembled within a planning horizon. Due to stochastic factors such as unexpected delays, queuing and machine failure, operation time provided by mathematical model cannot reflect dynamic characteristic of realworld systems and optimal solution of mathematical model is not acceptable in practice. Therefore, to explore the behaviour of the real-world system, a hybrid mathematical-simulation approach is proposed. The applicability and flexibility of the proposed model and approach are illustrated through an example problem.

Anahtar Kelimeler

• Production planning, Linear programming, Simulation, Hybrid approach

TEDARİK ZİNCİRİ AĞI İÇERİSİNDE ÜRETİM PLANLAMA PROBLEMİ İÇİN MELEZ ANALİTİK/BENZETİM ÇÖZÜM YAKLAŞIMI

Öz

Endüstriyel rekabet arttıkça tedarik zinciri yönetimi literatürde daha fazla önem kazanmaktadır. Tedarik zinciri yönetimi ürünlerin tedariği, üretilmesi, depolanması, dağıtımı ve kontrolünü içeren bütünleşik bir yapıdır. Bu makalede tedarikçilerden çeşitli bileşenlerin tedarik edildiği ve fabrikada nihai ürün üretiminin yapıldığı bir tedarik zinciri sisteminde tedarik ve üretim planlama problemi ele alınmıştır. Planlama periyodu boyunca bileşenlerin montajının yapıldığı problem için doğrusal bir matematiksel model geliştirilmiştir. Beklenmedik gecikmeler, makine bozulmaları, makine çalışma süreleri gibi bazı stokastik faktörlerden dolayı matematiksel modeller gerçek sistemlerin dinamik karakteristiklerini temsil edemezler. Bu nedenle, gerçek sistemin davranışını ortaya çıkarmak üzere melez bir matematiksel programlama/benzetim modeli önerilmiştir. Model ve yaklaşımın uygulanabilirliği bir örnek problem üzerinde gösterilmiştir.

Anahtar Kelimeler

• Üretim planlama, Doğrusal programlama, Benzetim, Melez yaklaşım

Kaynakça

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