To ensure that the document has been drawn from the customer and the submitter is correct and can be implemented in the relevant operating appropriately. It is not the draw that was used.
To ensure that all drawings, documents received from customers and deliveries are accurate and can be used in the practical work involved appropriately. Control the obsolete documents drawings. Is in operation.
To ensure that documents drawn received from customers and suppliers is correct and can be applied to use is in involved appropriately. Does not control the documents drawn to quit it.