Ubunzima beJiajia ubunzima obuxande buyilelwe ukuqinisekisa iindlela zokusebenza ezikhuselekileyo nezisebenzayo, zibenza zibe sisisombululo esifanelekileyo kwiinkqubo zokulinganisa ngokuphindaphindiweyo. Ubunzima benziwa ngokuhambelana nemigangatho ye-OIML-R111 yezinto eziphathekayo, imeko yomphezulu, ingxinano, kunye nemagnethi, ezi zilinganisi ukhetho olufanelekileyo lwemigangatho yokulinganisa iilebhu kunye namaZiko eSizwe.