Ukwehla kwamandla emali kusho ukuthi izinga elijwayelekile lentengo liyenyuka, okuphambene nokwehla kwamandla emali. Kuzodingeka imali eyengeziwe yokukhokhela izinto (njengesinkwa) nezinsizakalo (njengokuya kumgundi wezinwele).
Ukwehla kwamandla emali kusho ukuthi izinga elijwayelekile lentengo liyenyuka, okuphambene nokwehla kwamandla emali. Kuzodingeka imali eyengeziwe yokukhokhela izinto (njengesinkwa) nezinsizakalo (njengokuya kumgundi wezinwele). Izazi zezomnotho zilinganisa ukwehla kwamandla emali njalo ukuze zazi isimo somnotho. Ukwehla kwamandla emali kushintsha isilinganiso semali uma siqhathaniswa nezimpahla noma izinsizakalo; kudingeka imali eningi ukuze kuthengwe inani elifanayo lempahla noma lenkonzo, noma inani elifanayo lemali lizothola inani eliphansi lempahla noma lenkonzo.