Bronze silver gold is one method of distinguishing among raw, cleaned, and business ready data. Bronze represents the “raw” data with minimal changes; Silver represents cleaning and validation of the data; Gold represents the data that have been prepared for reporting, dashboarding, or analytics. By separating these steps it will be easier to trouble shoot since the transformation can be located as the cause of a problem. When designing analytics and data management processes, Datalance also talks about these types of structured data practices.
Charles Jone 
