Ngeminyaka yesipiliyoni ekukhiqizweni kokukhiqizwa yamehlo ephathekayo , kwengcindezi kungahlinzeka ngezindlela eziningi zokulinganisa ingcindezi yengcindezi ephathekayo . yokulinganisa kwengcindezi ephathekayo kungahlangabezana nezicelo eziningi ngokulinganiswa kwengcindezi yengcindezi yamehlo ephathekayo . Ngaphezu kohlu lomkhiqizo olungezansi, ungaphinde wenze ngokwezifiso isilinganiso sakho sengcindezi ephathekayo ephathekayo ngokwezidingo zakho ezithile.