Sixhotyiswe ngezixhobo zokuhlola eziphambili ezifana neBrown & Sharpe umatshini wokulinganisa ulungelelwaniso-ntathu, i-Colin Begg P100/P65/P26 iziko lokulinganisa, isixhobo saseJamani iMarl cylindricity, umhloli we-roughness waseJapan, iProfayili ye-Optical, iprojekti, umatshini wokulinganisa ubude njl.njl ukuqinisekisa ukuba ukuhlolwa kokugqibela ngokuchanekileyo nangokupheleleyo.