I. Zofunikira:
Zingwe ziyenera kukhala ndi zotchinga zabwino kuti mupewe kutaya magetsi.
Sankhani zinthu zoyenera zothandizira kutengera chilengedwe ndi kusagwiritsa ntchito, monga kukwera kwa kutentha kwamoto, mafuta -
Ii. Kusankha kosankhidwa
Sankhani mtundu woyenera wa chinsinsi malinga ndi zomwe amagwiritsa ntchito, zikhalidwe zake, zomwe zimafunikira, monga zingwe zamphamvu, zingwe zowonongeka, etc.
Mphepo {-
Iii. Zofunikira:
Chingwe chogona chimayenera kutsatira miyambo yofunika, monga "Code kukhazikitsa mizere ya chingwe", etc.
Zingwe ziyenera kuyang'aniridwa kuti ziikidwe m'malo ovuta monga kutentha kwambiri, chinyezi komanso kuthengo.
Panthawi yochepa yosanja, kuwonongeka kwa chingwe chotchinga chotchinga kuyenera kupewedwa.
