The Revenue Model Framework (RFM) is a framework for creating and managing revenue models. It can be used by any kind of business or individual to create revenue models for their products, services, or even for the entire business. The RFM is an approach to thinking about revenue that focuses on the number of units that you sell. The RFM framework breaks down the units into small units, like a "product" or "subscription". Each unit has its own price and it is priced in terms of the unit itself.