1. Tswj cov khoom siv ceev: Raws li cov khoom siv thiab ziab cov xwm txheej, tsim kev tswj kom tsis txhob pub mis ceev nrawm lossis qeeb qeeb los ua haujlwm kom zoo.
2. Tswj kub: Raws li cov yam ntxwv ntawm cov khoom siv thiab ziab kom muaj cov cua txias kom tsis txhob muaj qhov kub thiab cua txias, uas cuam tshuam cov nyhuv kom qhuav.
3. Kev tu ib txwm: Txheeb xyuas thiab tswj cov khoom siv roj Reducer, nrog rau kev hloov pauv roj reducer, thiab lwm yam haujlwm ntawm cov khoom siv.
4. Cov khoom siv hloov tau: lub tshuab nqus tsev tau haum rau ntau yam khoom siv, tab sis cov kev ua haujlwm ntawm cov khoom sib txawv yuav tsum tau hloov kho kom ua tiav qhov zoo tshaj plaws kom qhuav.
