Requirements traceability defines a relationship between two or more requirements. When analyzing the impact of a change proposed in a specific requirement, the traceability links indicate the other requirements that the change might affect.
You can add traceability links to and from a selected requirement.
Trace from links indicate requirements that affect a selected requirement.
Trace to links indicate requirements that are affected by a selected requirement.
When a requirement changes, Application Lifecycle Management (ALM) can alert the affected requirements. For more details on alerts, see Alerts Overview.
For task details, see How to Trace Requirements.