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. It provides a single reliable source of. A functional requirements document (frd)—also known as a functional requirements specification, functional specification, or functional specification document—is a more. This document is a functional requirements document (frd) template that outlines the sections and content needed for documenting software requirements. Business requirements documents (brds) center on strategic objectives, business processes and user needs at a high level.