Ikirere cyikirere nikintu gikunze kugaragara mubusitani, ibara ry ingese ubwaryo ni ryiza cyane, haba mubikorwa bifatika kandi byiza, ibyuma byikirere bifite ibyiza byinshi, kimwe mubyiza ni
Mugushushanya ahantu nyaburanga cyangwa imbere cyangwa hanze yinyuma, biroroshye guhinduka muburyo butandukanye no gukomeza ubunyangamugayo buhebuje.
Ibyiza byicyuma cyikirere:
1. Ibyuma byangirika bizahinduka hamwe nigihe. Ibara ryacyo, urumuri no kwiyuzuzamo biruta ibikoresho rusange byubwubatsi, kubwibyo biroroshye kumurika inyuma yibiti byatsi byo mu busitani.
2. Ikirere cyoroshye biroroshye guhinduka muburyo butandukanye kandi birashobora kugumana ubunyangamugayo buhebuje.
3. Isahani idashobora guhangana nikirere irashobora kugabanya neza kandi neza umwanya, kugirango urubuga rushobore kugabanywa mubice byinshi.
4. Ubuhanga bwo guhindagura ibyuma biri muburyo ibara ryibishushanyo byibyuma bizahinduka buhoro buhoro nibisanzwe nibyiza mugihe cyigihe.