Business Problem:  

Creating Top 10 partner reports or rollup fields for how many times someone or an organization has referred business to you is not straightforward in Salesforce. 


Count the number of referred items (e.g. leads, custom objects, contacts, etc) and do a SUM (Count) rollup to the parent level. For example, one of our clients wanted to to track how many times they got a medical referral (Custom object) and rolled up the count of these to the Physician (Contact) that submitted the referral.