Simulation Of Inventory Control System For Supply Chain "Producer - Wholesaler - Client" In ExtendSim Environment

There is considered a two-level single-product inventory control system which controls correspondingly the wholesale’s warehouse and the customers’ warehouses. For delivering the product there has been organized a supply chain “producer – wholesaler – customer”. It is assumed that the customers and the wholesaler shape their stocks having in mind the minimization of the total costs of the product ordering, holding and losses from deficit per time unit. The customers’ demands for the product and the time of delivering the cargo from the producer to the wholesaler and from the wholesaler to each of the customers are random values with known laws of distribution. The wholesaler orders the goods at the fixed, equally distant, moments of time. The order of goods is performed by the customer at a random moment of time, when the remains of the goods in his warehouse have reduced up to a fixed level called the reorder point. In the given paper there is suggested a simulation model of the above inventory control. The ExtendSim 8 package has been used as the means of simulation. The numerical examples of the problem solving are presented.