Approach
Current System Analysis
In order to understand the current system we have analyized data obtained from TOFAŞ. We have determined the symptoms and complaints of the problem.
Mathematical Model
We have delevoped a mathematical model which gives the optimal schedule for product replanishment by minimizing the inventory cost. So far we have solved our mathematical model in GAMS. For our mathematical model, the following constraints are in our concern.
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Current Supplier List
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Available Storage Area Volume
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Available Small/Big Truck Volume
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Rent of the Storage Area
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Cost of Raw Materials
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Cost of Labor Force of Storage Area Employees
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Cost of Deterioration and Operations of Forklifts
Simulation model
It has four main phases;
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Arrival of big and small trucks that are sent from suppliers at TOFAŞ
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Controlling availability of Unloading Area
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Unloading process and carrying operations to the warehouse with Forklift1 / Forklift2 / Forklift3
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Disposing cases from the system to be used in manufacturing area
This model simulates the material flow from arrival to the beginning of the production line. Also forklift motions and inventory level of products can be obtained from the model.