1.Umehluko womsebenzi: umsebenzi waphezulu emnyango ukuxhasa, ngenkathi umsebenzi wesivalo somnyango kungukubamba umnyango nokuwulungisa ukuze uvimbe umnyango ukuthi ungavalwa ngenxa yomoya ovunguzayo noma othinta iqabunga lomnyango.

2. Umehluko wohlelo lokusebenza: phezulu umnyango uvame ukusetshenziswa ethoyilethi, futhi isivalo somnyango sisetshenziselwa igumbi lokulala noma umnyango wasekhishini.

3. Umehluko wokwahlukaniswa: phezulu komnyango kungolunye uhlobo, futhi isivalo somnyango sehlukaniswe ngezinhlobo ezimbili: isivalo somnyango kazibuthe onomphela nesivalo somnyango kagesi. Isivalo somnyango kazibuthe onomphela sisetshenziswa kakhulu eminyango ejwayelekile futhi singalawulwa kuphela ngesandla; isivalo seminyango kagesi sisetshenziswa eminyango yomlilo nakweminye imishini yokulawula i-elekthronikhi nemishini yewindi, futhi inakho kokubili ukulawula okwenziwa ngesandla kanye nemisebenzi yokulawula okuzenzakalelayo.