In the case a SmarTeam Item contains Integration data (a non-Master CAD Document that is a simplified representation of the 3D Master for instance), you can proceed with the Ready For Check in PLM only if you ask the Integration team to transfer you the responsibility.
Once the data is available in the PLM after "Ready for Check in PLM", you need to add the Integration Team as Additional Reviewers for the data verification process.
Additional Reviewers are used to involve additional people in the verification process of a given Part, on top of the standard assignees of the Design Verification Workflow control activities.
Assigning Additional Reviewers is typically optional. However, from methodology perspective, it becomes mandatory if the Part contains Integration models.
Depending on your Project, you will need to assign a specific reviewer group.
Please find the full list of reviewers groups in this EDMS document provided by the EN-ACE-INT section.