Trace kudziyisa iko kushandiswa kwehuwandu hunodzorwa hwekudziya kwemagetsi pamusoro pepombi, matangi, mavharuvhu kana midziyo yekushandisa kuti ichengetedze tembiricha yayo (nekutsiva kupisa kwakarasika kuburikidza nekudzivirira, kunonziwo kudzivirira kwechando) kana kukanganisa kuwedzera kwekushisa kwayo. .