The costs depend on the kind of changes to be made. In most cases, the changes refer to the contents and affect the text and/or the illustrations.

When such changes occur, the textual and graphic data must first be prepared - just as was the case with the initial creation of the catalog. Then follows the transition of the data and its storage into the file formats required by the electronic catalog, including the creation of links and hotspots.

As was the case with the original creation of the catalog, how these tasks are executed directly affects cost. In comparison to that first creation, recurrence is the factor in a revision that needs special emphasis: these costs recur with every revision.

Therefore, revisions also offer the main savings potential.