To help you upsurge towards your business goals, we suggest you to try using a business requirements document. If you are unfamiliar with this document, do not be vexed. Writing a functional requirements document (frd) is an essential step in the software development process. The frd is produced by business analysts or sometimes the technical team in response to the business. [provide a list of contractual or task level assumptions and/or constraints that are preconditions to preparation of the frd.