This comprehensive guide will equip you with the knowledge and tools to create a robust and effective frd template. What is a functional requirements document? 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 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. [provide a list of contractual or task level assumptions and/or constraints that are preconditions to preparation of the frd.