The overall obs covers a wide range of features, which are. Writing a functional requirements document (frd) is an essential step in the software development process. Streamline your project planning with our comprehensive functional requirements document template. Business requirements documents (brds) center on strategic objectives, business processes and user needs at a high level. 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.