It provides a single reliable source of. According to the internet, a functional requirements document, abbreviated as frd, is a formal statement of an. A user requirements document, written by the product manager, is centered around the end user’s needs and expectations for a product.it translates user requirements into. If you are unfamiliar with this document, do not be vexed. This document underlies the functional requirements for implementing online banking solution (obs) for global bank ltd (gbl).