KAPALI DÖNGÜ TEDARİK ZİNCİRİNDE İTME VE ÇEKME STRATEJİLERİNİN KARŞILAŞTIRILMASI

With the increase in environmental pollution, legal obligations and economic reasons, the importance given to reintroduce the

recycling products in the economy is increasing day by day. The already complex supply chain structure becomes even more

complex by the reintroduction of these products into the system. To overcome the existing complexities, a strategically efficient

management of the chain has become inevitable. In this study, a closed loop supply chain network with supplier, factory, distribution

center, wholesaler and customer in forward flow and collection center, recycling plant and landfill in reverse flow is modeled using

simulation. Push and pull strategies are used for operational planning and control of the closed loop supply chain network. Models

considering pure push and pure pull strategies are run on a hypothetical data set. The performance of the models is compared using

the criteria of total profit, total sales, total cost of inventory, unsatisfied demand, average daily inventory and average response time

to customer demands. As a result of the comparisons, it can be seen that when examining customer service levels, the push based

closed loop supply chain achieves better results, while when examining total profit and inventory levels, the pull based closed loop

supply chain achieves better results.