According to the BABOK® Guide, a requirements trace matrix is a table that links requirements to their origin and traces them throughout the project life cycle. A requirements trace matrix is useful for tracking the status, priority, and satisfaction of requirements, as well as identifying dependencies, gaps, and overlaps. A requirements trace matrix is suitable for smaller projects where there are few requirements, as it can provide a simple and effective way to trace the few requirements for the project1. References: 1: BABOK® Guide, version 3, section 10.32, page 344.