The workflow initiator has to select the people in charge of the “Design Documentation Check” and “Part Design Approval” activities from the “Reviewers” tab, available from the Design Verification workflow profile card.

Design Documentation Check: to be assigned to users holding the “Design Reviewer” role.

Part Design Approval: to be assigned to users holding the “Equipment Owner” role.

For assigning the activity to a Reviewer you need to select the icon that appears after you have clicked in the field:

Complete documentation: Design Verification Workflow FAQ