Kev ua tau zoo yog tus cwj pwm, ib qho uas tshwm sim los ntawm kev ua raws li cov qauv siab. Peb pab neeg ua haujlwm tau zoo txuas ntxiv txhim kho peb cov tshuab thiab cov txheej txheem los ntawm ISO pom zoo kev tswj hwm qhov system.Raws li cov neeg siv khoom xav tau thiab kev lag luam, peb ua txhua yam tsim nyog kuaj thiab tshuaj xyuas cov khoom rau daim ntawv, haum, thiab ua haujlwm.To tswj kom zoo thoob plaws hauv cov txheej txheem ntau yam kev ntsuas, suav nrog CMM (Coordinate Measuring Machine), yog siv los xyuas kom meej tias cov khoom raug tsim los rau specifications.The PMM mus kom ze rau kev tswj kom zoo thiab kev soj ntsuam cov neeg siv khoom thiab cov khoom tsim nyog. kev tswj hwm ntawm PMM yog lub voj kaw, qhov kev txhim kho thiab kev tawm tswv yim tsis tu ncua. Ua tsaug rau qhov system no, PMM tuaj yeem teb cov lus nug ntawm cov neeg siv khoom sai, ua tau zoo, thiab ua kom meej meej.

