Relationships
Relationships link items together. When items are linked, you can assess the impact an item or group of items can have on other items.
Traceability is defined by relationships. When one item changes, you can check related items to make sure they are still accurate and verify that requirements are written.
Relationships can be upstream or downstream from an item. With appropriate permissions, you can relate items within the same project or between multiple projects. Find and view relationships in Single Item View.
You can also add relationships from:
List View, Reading View, or Trace View (by adding a new related item)