According to the internet, a functional requirements document, abbreviated as frd, is a formal statement of an. [provide a list of contractual or task level assumptions and/or constraints that are preconditions to preparation of the frd. 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. 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.