Lub ntsiab tseem ceeb ntawm duab tshav
Xam xyuas qhov ntsiab lus ntawm geometric xav tau kev sib txuas khoom txuas ntxiv ntawm kev soj ntsuam. Nws lub ntsiab siv yog:
1. Nruab nrab qhov sib piv, Performance index, thiab lwm yam.;
2. Suav kev loj hlob ntawm qhov nruab nrab nrawm;
Ntawm lawv: cov ntaub ntawv piv txwv yog tsis zoo, feem ntau siv rau log-ib txwm faib.
3. Qhov paj nruab nrab txhua xyoo raws li cov paj laum sib koom;
4. Kev ua haujlwm ua haujlwm rau kev ua haujlwm tsis tu ncua yuav tsum nrhiav qhov nruab nrab ntawm cov khoom nruab nrab.