1. Gqibezela iinkcukacha, izinto ezahlukeneyo;
2. Ukuchaneka okuphezulu kwe-dimensional, ukuya kuthi ga ku-± 0.1mm;
3. Umgangatho olungileyo womphezulu, ukuqaqamba okulungileyo;
4. Ukuxhathisa okuqinileyo kwe-corrosion, ukomelela okuphezulu kunye namandla okudinwa;
5. Ukubunjwa kweekhemikhali ezizinzile, insimbi ecocekileyo, umxholo ophantsi wokubandakanywa;
6. Ukupakishwa okulungileyo, ixabiso elifanelekileyo;
7. Ingenziwa ngaphandle kokulinganisa.