Kev tu txhua hnub ntawm cov khoom siv hauv chav huv yog qhov tseem ceeb rau kev ua kom ruaj khov ib puag ncig huv, ua kom lub neej kev pab cuam ntawm cov khoom siv, thiab tiv thaiv kev sib kis thib ob; Cov txheej txheem tu tus txheej txheem yuav tsum tau tsim rau ntau hom khoom siv.
Kev Cia Siab: Cov khoom siv yuav tsum tau muab ntim rau hauv lawv cov ntim khoom qub txhua lub sijhawm; Kev raug ncaj qha rau qhov zoo tib yam, tsis yog - ib puag ncig huv yog txwv tsis pub tiv thaiv kev sib kis ntxov ntxov los ntawm cov kab mob thiab cov kab mob.
Cov txheej txheem siv: Thaum siv cov ntaub so ntswg, ua raws li txoj cai unidirectional so; tsis txhob rov siv dua, cov chaw muaj kab mob, vim qhov no tuaj yeem ua rau kis kab mob.
Kev tshuaj xyuas ib ntus: Ua ntej txhua qhov kev siv, tshuaj xyuas cov npoo thiab qhov chaw ntawm cov khoom siv rau cov cim qhia ntawm hnav lossis ua kom tawg; muab pov tseg thiab hloov lawv tam sim ntawd yog tias pom muaj qhov txawv txav.
