Iyi koroneri eshatu, izwi kandi nk'igipimo, ni imashini ipima neza, yitwa CMM. Ni igikoresho gipima neza neza cyakozwe mu myaka ya 1960. Yavutse bitewe n'uburyo bwo gukora ibikoresho by'imashini byikora n'ibikoresho bya CNC, ndetse no gukenera ibikoresho byo gupima byihuse kandi byizewe byo gutunganya ibice birushijeho kuba bigoye.

Kuri ubu, gupima ibice bitatu byakoreshejwe cyane mu nganda zitandukanye nko gukora imashini, inganda z'imodoka, inganda z'ikoranabuhanga, inganda z'indege, nibindi, kandi byabaye ibikoresho by'ingenzi cyane byo gupima neza mu nganda zigezweho no kugenzura ubuziranenge. Ku bipimo byacu byihariye bitari ibipimo bisanzwe, gupima ibice bitatu ni ibikoresho by'ingenzi byo gupima. Nyuma yo kubona ibishushanyo by'ibicuruzwa by'umukiriya no gushushanya igishushanyo mbonera cyujuje ibisabwa by'ibicuruzwa kandi umukiriya akanyurwa, ni ngombwa. Tangira intambwe zo gutunganya mu cyiciro cya nyuma, hanyuma tugomba gukoresha gupima ibice bitatu, kuko ukuri kw'igikoresho ubwacyo ari hejuru cyane, bityo rero kikoreshe mu gupima ukuri kwa buri gice cy'igipimo cyacu, kuko igipimo ubwacyo gishimangira neza uburyo ibikoresho byacu byo kugenzura bihagaze. Urugero, aho igipimo giherereye, ubugari n'imiterere yacyo birimo ibice bimwe na bimwe by'imodoka. Twese dushobora kubona ingano nyayo dukoresheje uburyo bwo gupima ibice.