The problem of determining the order batches is recurring in the industries. On the basis of sales forecasts and firm orders the production plan is established. The issue of supply planning to meet the net needs of production then becomes an important one because the stakes are different:
If techniques such as the just-in-time can be used for the reduction of inventory quantities, there is nevertheless the problem of determining the size of the economic order batches. We recall that the choice of the appropriate supply model allows to track the level of the stocks and to plan the launching of the orders of materials.