This document is a functional requirements document (frd) template that outlines the sections and content needed for documenting software requirements. The overall obs covers a wide range of features, which are. Business requirements documents (brds) center on strategic objectives, business processes and user needs at a high level. Writing a functional requirements document (frd) is an essential step in the software development process. [provide a list of contractual or task level assumptions and/or constraints that are preconditions to preparation of the frd.