Cov kev pheej hmoo tseem ceeb ntawm cov dig muag me ntsis yog "kev tiv thaiv tsis ua haujlwm", uas muaj:
Cov Neeg Ua Haujlwm Raug Mob: Thaum ib tus neeg nkag mus rau qhov chaw tsis pom kev, thiab kev ua haujlwm ruaj khov ntawm cov khoom siv yuav ua rau muaj kev sib tw xws li extrusion, shearing, thiab kev sib tsoo.
Cov khoom puas tsuaj: yog tias cov khoom txawv teb chaws (xws li cov cuab yeej thiab cov ntaub ntawv tsis pom kev, nws yuav ua rau cov khoom siv dig muag thiab cov khoom siv kom tau daig, qhov chaw hnav, lossis txawm tias swb.
Cov teeb meem ua raws: Raws li kev nyab xeeb cov qauv (xws li ISO 13849 thiab EN 61496), cov khoom siv kev nyab xeeb yuav tsum tau them rau txhua qhov chaw txaus ntshai. Cov duab dig muag yuav ua rau cov khoom siv tsis ua raws li cov kev nyab xeeb thiab lub ntsej muag ua tsis raws cai.
