Kev ua kom raug qhov tseeb ua kom muaj qhov tseeb siab txo qhov kev pheej hmoo ntawm kev ua tsis tiav hauv qab kev ntxhov siab thiab txhim kho kev ntseeg siab ntawm lub kaw lus. Kev siv cov thev naus laus zis no tso cai rau cov qauv geometries nyuaj uas cov txheej txheem tsim khoom ib txwm yuav nyuaj rau ua tiav. Raws li kev lag luam fais fab cua txuas ntxiv mus, lub luag haujlwm ntawm lub ntiaj teb carrier ua rau muaj kev tseem ceeb ntxiv, pab txhawb rau kev hloov pauv hluav taws xob zoo dua thiab kev ruaj khov dua hauv kev daws teeb meem hluav taws xob rov ua dua tshiab.
Peb tau nruab nrog cov khoom siv tshuaj xyuas zoo li Brown & Sharpe peb-coordinate measuring tshuab, Colin Begg P100 / P65 / P26 ntsuas chaw, German Marl cylindricity instrument, Nyiv roughness tester, Optical Profiler, projector, ntev ntsuas tshuab thiab lwm yam kom paub tseeb tias qhov kev tshuaj xyuas zaum kawg raug thiab tiav.