Adding links to an MBRE traceability diagram (MBRE profile)
The MBRE Traceability Diagram is a PTC proprietary diagram that is available only when the MBRE Profile has been added to a model.
You can populate missing links relating to the all items or a single item on an MBRE Traceability Diagram.
For information about adding Variability items and relationships to an MBRE Traceability Diagram, click here.
To add a missing constrain, fulfill or validate relationship
1. On the diagram's toolbar, click the Constrain, Fulfill, or Validate button.
2. Click the start item, and then click the end item.
3. From the context menu, click the command for the missing relationship you want to add.
To add missing links relating to all items on an MBRE traceability diagram
1. On the MBRE Traceability Diagram, right-click in free space.
2. Point to Populate, point to Links, and then click the command for the link type you want to populate, that is, Constrains, Fulfills, or Validates.
Link types of the type you selected that exist between the items shown on the diagram are added to the diagram.
To add missing links relating to an item on an MBRE traceability diagram
1. On the MBRE Traceability Diagram, right-click the item.
2. Point to Populate, point to Links, and then click the command for the link type you want to populate, that is, Constrains, Fulfills, or Validates.
Link types of the type you selected that are linked to the item you right-clicked are added to the diagram. If the target or source item for a linked item is not shown on the diagram, Modeler adds the item to the diagram so that the link can be shown.
Constrain, 
Fulfill, or 
Validate button.