To reduce the level of preparation of a warehouse, warehouse space size should be minimized. Nevertheless, the situation with Kanban JIT production system is currently considered the need for a number of stocks in the warehouses of spare parts made by the previous process. The reason is: 1. When the system is taking a fixed amount and the cycle does not remain in use, the former should have a number of stocks of spare parts so to adjust to the scheduling decision is not necessarily time. With this system, the scheduling of the retrieval time is not necessarily due to fluctuations in demand in foreign markets. 2. When the system is fixed and the numbers of retrieval cycles used are not fixed, the former should have some preparation to adjust to the number of shots that are not fixed by the next process. Again, with this system, the number of shots because of the behavior of white fluctuating customer demand.