The Fast-Track Promotion can be used to approve the Part without going through a Design Verification, in case the Master CAD Documents are in Approved/Released state.

Once the Part is Approved/Released, you may have the need to just attach to the Part additional documentation, without modifying the Master CAD Documents. In such a case, you need to:

1. Version the Part.
2. Attach the additional documentation needed.
3. Promote the Part by using the Fast-Track Promotion, without going through a formal signature process.

Complete documentation: Fast-Track Promotion Workflow FAQ