Anyone using Set Attributes to dynamically update risk rating?

Our business is wanting to change the risk rating based on a dollar amount.  Was looking at the Set Attributes, haven't played around with that feature before, sooo thought I'd ask.  Anyone using the Data Set Attributes to update risk rating?  Looking at the doc, not entirely sure this will do what we're looking to do.  Thinking we need to somehow associate the risk rating to a dollar amount. 

Thanks!

Jay