<http://schema.org/description>
"&lt;p&gt;Coordinate measuring machines are not infallible. A variety of factors can adversely affect their measuring accuracy, including a crash, large temperature fluctuations, a malfunctioning probe head, use of an uncalibrated probe - even a person leaning on the machine gantry might be enough to take it out of square. If the CMM's true capability is verified only once a year via laser or another calibration method, then it's possible that the CMM might be inaccurately measuring parts for an extended period of time, unbeknownst to the operator. The question remains - did a workpiece fail inspection because of an imprecise manufacturing process or an inaccurate CMM?&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/articles/the-value-of-daily-cmm-capability-checks>