Sixhotyiswe ngezixhobo zokuhlola ezikumgangatho ophezulu ezifana neBrown & Sharpe umatshini wokulinganisa olungelelanisiweyo wesithathu, uColin Begg P100/P65/P26 iziko lokulinganisa, isixhobo saseJamani iMarl cylindricity, umvavanyi wokurhabaxa waseJapan, iProfayili ye-Optical, iprojekti, umatshini wokulinganisa ubude njl. kuhlolwa ngokuchanekileyo nangokupheleleyo .