Quality assurance control highly depend on CMMs. Over the last 20 years, they have almost replaced other inspection techniques such as fixtures and gauges. Since CMMs are very flexible, they reduce investment costs and increase inspection throughput.
Nationally and internationally recognised performance standards provide the means for CMM users to rate the calibration services of different providers. These standards are necessary when comparing competing suppliers, to help determine how well they will perform and to check whether they know how to work properly and safely.