They communicate what problem needs. An frd or functional requirements document serves as a contract for formal statement, between the business stakeholders and the technology team, on an application’s functional requirements. A user requirements document, written by the product manager, is centered around the end user’s needs and expectations for a product.it translates user requirements into. An frd defines the specific functions and features that the. It allows you to apply a ratings system to your requirements, so you have the visibility (into the value, status, and description of each requirement) that’s.