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Calibration is the process of comparing and adjusting a measurement instrument or system against a known reference standard to ensure its accuracy and traceability. In product design, innovation, research, and production, calibration ensures consistent measurements, reduces uncertainty, and enables reproducible test results and reliable quality control across development and manufacturing. Regular calibration, documented outcomes, and use of accredited procedures maintain instrument performance, support regulatory compliance, and inform decisions about design tolerances and process adjustments.