This document specifies the acceptance tests for verifying the performance of an optical 3D coordinate measuring system (CMS) when measuring lengths as stated by the manufacturer. It also specifies the reverification tests that enable the user to periodically reverify the performance of the optical 3D CMS.This document is applicable to verification of the measuring performance of CMSs if the surface characteristics (e.g. glossiness, colour) of the object to be scanned are restricted and within a cooperative range.This document does not apply to other types of CMSs, including those covered by the other parts of the ISO 10360 series.