Definitions for "Requirements Management"
Requirements management is the process by which changes to requirements are managed throughout the system lifecycle.
The activities, processes and change control techniques in order to ensure that requirements keep in step with the operational system. System changes must be reflected as requirements changes and vice-versa.
The activities or processes that assess, refine, and prioritize business needs to address the requirements of the changing business environment, to establish and maintain an up-to-date understanding between business needs and the development organizations regarding the requirements to be addressed by the delivered product.