Nick ... you have to identify all your production vs test backups, critical & 
important production vs plain production backups, and determine your backup 
windows of opportunities based on the applications' SLAs.  For many shops ... 
critical/important prod backups are ran during "oh-dark-early" hours (00:01 - 
05:00) while many test server backups are ran during the weekdays and/or 
outside prod windows.  There might not be any easy way to effectively do the 
job without mapping all this out ... more of an art rather than a science.

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