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. It provides a single reliable source of. An frd or functional requirements document serves as a contract for formal statement, between the business stakeholders and the technology team, on an application’s functional requirements. The overall obs covers a wide range of features, which are. Documenting the functional requirements provides several important benefits to the organisation and to the process of developing a solution.