You need only one MFHD and one Item record when you have a single location.
You need only one MFHD but more than one Item record any time there is more than one piece to barcode. This includes any time you have either of the following:
You need multiple MFHDs and multiple Item records when you have more than one location.
NOTE: The number of volumes does not affect the number of MFHDs. Every piece that has a barcode will require a separate Item record.
The following example illustrates a book with three copies with holdings in the main stacks and off-site storage.
The following example illustrates an ongoing serial with three issues with holdings in Periodicals.