1. Kev tsim tawm loj thiab kev ua haujlwm siab: kev ua haujlwm nruam thiab ruaj khov, lub tshuab ib leeg tso tawm qhov txuas nruam sib xyaw ua ke yog siab.
2. Kev sib xyaw tsis sib xyaw: qhov sib xyaw nkag mus rau hauv qhov chaw tov yog cov khoom siv homogeneous, thiab txheej txheem kev sib xyaw ntawm cov khoom sib xyaw hauv cov khoom sib tov yog cov txheej txheem sib xyaw thiab dej, yog li cov sijhawm sib tov tuaj yeem ua kom luv.
3. Tsis muaj qhov nqes dej thiab hnav qis: qhov pub mis kawg ntawm cov khoom sib txuas tas mus li yog rau cov khoom siv ua kom qhuav thiab ob sab ntug kawg yog nruab nrog cov khoom rov qab. Yog li ntawd, tsis muaj teeb meem ntawm kev xau dej xau. Tus agitator tsis muaj qhov siab xav tau rau cov khoom hnav-tiv taus.
4. Ua tsis tiav: lub sijhawm pib thiab nres ntawm tag nrho cov cuab yeej ntawm kev sib xyaw ua ke ntawm cov nroj tsuag tsuas yog 1 / 7-1 / 3 ntawm qhov sib quas ntus sib xyaw cog cov ntoo, yog li cov khoom siv tau ua haujlwm ntev thiab tsis ua haujlwm poob qis.