It's easy to visually see what mistakes possibly have been made which may affect the reviewers next process, such as sending to Fast CATALOG or LKQ, or reporting to the Adjuster or Insured.  

Visually, it's easy to see if the wrong items are in a cleaning box, or if multiple items are mixed together on one line item where they should actually be multiple line items, or poor images, etc.  

Once you understand how to visually review a pack-out, you will want to do this all the time as catching issues before you start processing will save a lot of resources down the line if these issues go unchecked.