A method implemented in a data processing system including an image forming apparatus for producing a print job, which includes the steps of: (a) receiving data representing a document to be printed in the print job; (b) receiving job information about the print job; (c) determining if the job information includes an instruction to print multiple copies of the document in a collated order; (d) forwarding the data representing the document to be printed in the print job to an external storage unit when multiple copies of the document in collated order have been requested; (e) retrieving the data from the external storage unit; and (f) printing the multiple copies of the document in collated order.