To enable easy restoration even if one machine gets out of order by processing a file when a reference file needs to be generated, adding the whole file to be updated and updating the file, and copying detail data to computers and holding them.

A create(generation) part 1510 classified and rearranged files with easy-to-see names on machines 1500, etc., decentralized in conformity with the organization and detail data are rearranged and added to attribute totalization files, e.g. files 1520 by article groups. The detail data are not discarded, but saved in the files 1520 by the article groups, etc., A reference part 1540 performs processing by one flow by using the rearranged data to generate a necessary document 1555 through necessary combination, inter-item operation, shaping, etc., and generate a screen for reference from the start on the spot. When a new item 1570 is requested, a file 1560 is generated which has the item file added to and combined with a last file 1565 by a POMPA batch.