[provide a list of contractual or task level assumptions and/or constraints that are preconditions to preparation of the frd. According to the internet, a functional requirements document, abbreviated as frd, is a formal statement of an. Are you wondering what a functional requirements document or what an frd is? The frd is produced by business analysts or sometimes the technical team in response to the business. Business requirements documents (brds) center on strategic objectives, business processes and user needs at a high level.