Codes allow them to sort the lists. This cost money for records which may end up being deleted. To order a title with the 2nd ISBN listed you need to manipulate the record. They create a list using the beginning and ending order numbers. They use Code3 to sort by location and then broadcast a list of 300-500 items to selectors.
Selectors have three to four days to make their selections from the lists.
Monographic series orders. These are ordered by series and cataloged by title. Receiving The quickest method is to rapid update create items. The minus is that you can't see the entire record and can't receive partial shipments. This locks the order and the bib from other activity during the process.