Lub hom phiaj tseem ceeb ntawm qhov tshuab slitting yog txiav hlais dav yob rau hauv dav dav ntawm qhov khoom, thiab tuaj yeem tshawb xyuas qhov khoom zoo. Nws lub ntsiab nta yog raws li nram no:
1. Kev kho hluav taws xob thev duab nrog high precision; Tswj hom yog muab faib ua ob qho ntaub ntawv: kev ceev thiab tsis siv neeg
2. Nws muaj ob txoj hauv kev ntawm qhov sib tw: qhov chaw ntuag cua thiab qhov chaw nruab nrab.
3. Kev tswj tsis nrawm yog siv rau kev nruj nrawm; Cov kev tswjfwm tiv thaiv muaj xws li nro tawm tswv yim tswj kev tswj thiab tswj tuav txoj cai.
4. Hloov cov cav ntuag txiav thiab cov tshuab cua txiav tawm hauv cov cuab yeej ywj pheej tau zoo thiab yooj yim rau kev hloov.
5. Qhov nruab nrab ntawm cov saum npoo yog saws rau dov, thiab qhov zoo ntawm dov yog txawm thiab ruaj khov.
6. Kev nres tsheb tsis tu ncua ntawm cov kav ntev thiab lub cav tsheb tsis zoo tuaj;
7. Txwv nrog ntug kev txiav, cov khoom siv sab nraud los ntawm tus kiv cua;
8. Kev tsim rau nqaim qhwv (rwb thaiv tsev, mica suab xev, zaj duab xis, thiab lwm yam) ntawm ntau hom nyias yob
