Are you wondering what a functional requirements document or what an frd is? 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. According to the internet, a functional requirements document, abbreviated as frd, is a formal statement of an. An frd defines the specific functions and features that the. Business requirements documents (brds) center on strategic objectives, business processes and user needs at a high level.