It’s tempting to wait until the PDF or EPUB files are ready before creating title records. We strongly encourage you to create title records ahead of time rather than waiting until the file is ready, particularly if you have someone on your production team uploading content files to the INBOX at sftp://ftp.netgalley.com.
If you have set up your title record ahead of time, as soon as the PDF/EPUB imports, you'll be able to start using the digital review copy immediately. Remember that a title can be created in NetGalley but still be private--so there's no harm in having a "work in progress" title record in your account.