Ithiyori Ngokuqhelekileyo, uhlalutyo lwesayizi yamasuntswana lubonelela ngomlinganiselo weenkozo zobubanzi obuhlukeneyo; olu hlalutyo lunokwenziwa mhlawumbi ngokuhluzwa okanye ngokufakwa kwentlenga emanzini xa kusetyenziswa umthetho weStokes.
Ngokuxhomekeke kubukhulu kunye nenani leenkozo ezenza i-aggregate, i-aggregates ibizwa ngokuba yi-fines, isanti, igravel okanye amatye. Nangona kunjalo, kwi-aggregate enikiweyo, zonke iinkozo eziyilayo azinamlinganiselo ofanayo zonke.
Ukwenza oku, iinkozo zihlelwa kwi-series ene-nested sieves.
