Ukusetshenziswa kwezihlanganisi kuvame ukuncika ezintweni ezihambisanayo noma ekusetshenzisweni kwepayipi. Ngesikhathi senqubo yokukhetha izihlanganisi, kubalulekile ukucabangela izici eziningana ezibalulekile njengezindleko, izimo zemvelo, ukuguquguquka, imithombo yezindaba, kanye nezilinganiso zokucindezela ezidingekayo.

Nakuba ukukhetha kwethu izinto zokufaka kubanzi, izinhlobo zezinto zokufaka ezitholakalayo zifaka phakathiI-BSP/BSPT, i-JIS, i-ORFS, i-JIC, i-UNF-UN, i-NPT, i-SAE, futhiI-Metricuchungechunge.

Sicela usithinte ukuze uthole imininingwane eyengeziwe ngakho.