Kuwala kogwira ntchito kumakhala ndi kuwala kowala kwa 1600-2000lm, ndikosavuta kugwiritsa ntchito ndi maso ndipo sikukhudza ntchito.Mapangidwe onyamula, amatha kunyamulidwa mozungulira.Akhoza kuikidwa pa nthaka yathyathyathya.Chingwecho chimavumbulutsidwa ndikupachikidwa mumlengalenga kuwonetsetsa kuti malo anu ogwirira ntchito akuwunikira bwino.