When a deliverable is complete it goes through a two-step process. First, quality control staff members will compare the final deliverable to the quality metrics developed during quality management planning. If there are discrepancies, the quality control staff will submit a change request asking for a defect repair to eliminate the discrepancies with the quality metrics. When the deliverable meets those standards, it becomes a validated deliverable.
At that time, the project sponsor and/or stakeholders go through their scope verification process to test the deliverable against requirements they identified during Project Planning. When the deliverable meets that test, it becomes a verified deliverable.
Watch this video where the quality control staff members compare the deliverables to the quality metrics.