There are few basic pre-requirements that must be fulfilled for being able to create a Design Verification Workflow:

• The Part must be in "In Preparation" lifecycle state.
• A Design Code must be assigned to the Part.
• The creator of the Workflow must hold the Contributor role in the Design Code set on the Part

You can create and launch a Design Verification by following the information contained in this article.

Complete documentation: Design Verification Workflow FAQ