Requirements traceability is a sub-discipline of requirements management within software development and systems engineering. Requirements traceability is concerned with documenting the life of a requirement and providing bi-directional traceability between various associated requirements. It enables users to find the origin of each requirement and track every change that was made to this requirement. For this purpose, it may be necessary to document every change made to the requirement.
It has been argued that even the use of the requirement after the implemented features have been deployed and used should be traceable.
Read more about Requirements Traceability: Overview, Definitions, Tracing Tools, Tracing Beyond The Requirements, See Also