Management system for Product Data Quality With more than 1,000 customers worldwide Q-Checker is the world leading system for quality assurance in the virtual development. Q-Checker, when operated from the early beginning in the design, will support cross engineering as well as model reuse in new projects and in downstream. Key to a successful implementation is the integration and adaptation to companies PLM processes. Q-Monitor allows statistical assessments to establish a continuous improvement process for PDQ.