Defines procedures for testing the performance of coordinate measuring machines of various designs that use multiple probing systems in contacting and non-contacting mode and pertains to - acceptance tests for verifying the performance of a CMM and its probes as stated by the manufacturer, - reverification tests performed by the user for periodical checking of the CMM and its probes, and - interim checks performed by the user for monitoring the CMM and its probes in between reverification tests.