Calibration - The Foundation of Accurate Measurement in Quality Engineering In QA/QC, even the best inspection processes fail if the measuring instruments are not accurate. Calibration ensures that every reading we take is correct, reliable, and traceable to a known standard. Why it matters: Prevents acceptance of bad parts Avoids rejection of good parts Builds customer confidence Essential for ISO, IATF, PPAP, and audits Protects against warranty issues & failures A small measurement error can