Iingcango zomlilo zeplanga ezifanelekileyo kufuneka zibe nenkangeleko epheleleyo, kungabikho monakalo, umphezulu ococekileyo, kungabikho zimpawu zokucwangcisa, iibhula kunye namanqaku ehamile. Emva kokuba umnyango womlilo wokhuni lwenziwe, i-primer (ioli eyomileyo) kufuneka ixutywe ngokukhawuleza ukukhusela i-deformation kumswakama. Kubomi bemihla ngemihla, iingcango zomlilo zokhuni zinokumelana nomlilo kunye nokukhuselwa kwendalo.