This blog post by Kim Spilker explains how to using a Requirements Mapping Matrix (RMM) to organize and identify requirements. The RMM is a visual model that can help organize requirements to find missing links, missing information, and unnecessary information you can cut. RMMs are used to map elements of models to one another, for instance to map business objectives, features, requirements and business rules to one another. Traceability matrices are similar to RMMs, but as you can map more than two objects to one another in an RMM, RMMs are more flexible and therefore provide more value than typical traceability matrices. RMMs can be used to control scope or to filter requirements. You can use Microsoft Excel as a requirements management tool to create and manage RMMs.
