Thus we must work the item above: Customer, Attendant and Technician = People? Request, Description, Order and Research of Satisfaction = Documents? Telephone = Equipment Sees that some of objects had above not been classified, had not the necessity of such process, therefore already it is in its correct classification, we must only use the plural one, therefore normally a classroom in the plural one must its origin in groups some objects. 7.ELIMITAR CLASSROOMS UNNECESSARY OR REPEATED Observes in the previous item that many classrooms are of the same sort, making with that it is repeated in the diagram and if a classroom if repeats in the data base will be a table created without intention none. To eliminate, let us see the classrooms first that we group for similarity: It observes that Asked for and Request in the scene it make reference to reference a table thing, thus can then eliminate one of the two, I I eliminated the request. It sees that Telephone is an equipment item, being thus we also can..