The Global Standard for Storage and Distribution allows the chain of product certification to be completed, from primary processor to manufacturer, and from manufacturer to retailer (or food service company in the case of food). 

The Guide to Key Changes outlines the changes made in Issue 4 of the Standard, along with the reasons they were made. It provides a full list of changes and requirements and is intended as a reference for managers needing to update their quality systems in preparation for an audit.