10 Tips for Writing Better Requirements Traceability Matrix Requirements traceability matrix (RTMs) are used in software development to show which requirements came from which source documents. They’re also useful for tracking down requirements that aren’t clear or documented well. Write down what you want to measure.   Determine how much you need to measure.   Decide if you need to measure at the unit level or the item level.   Determine if you need to measure quantity or quality.  …