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Today, in our country, enterprises face big challenges from a fierce competition, not only internal, also international, which operate with better conditions than ours. It is time to take advantages from scientific, technological and computing progresses like simulation, to be included by the management of organization, known as complex and dynamic systems. The operating manager for a wood enterprise likes the possibility to abate costs. His concern about the amount of compressed board stored and pretends to spend as little as possible on the transportation from the processing plants to the sales shops. An operating policy is built towards the costs reduction, working on three linked steps: transport, assuming that there are no problems with existence; warehouse inventory where the estimated demand derives from the results of the transportation item; and the distribution-inventory, solved by drawing a simulation model which uses initial values, the results of the previous items. The model refers to using tools from Linear Programming, Inventory theory and Dynamic Simulation. The costs generated with this analysis are smaller to those obtained without control on the system, 18.23 % on average. A recurrent solving method is contributed. [ABSTRACT FROM AUTHOR]