Urudodoicyumani ubwoko bwibyuma bikomeye bifite ibikoresho byiza bya mashini, bishobora kuzuza ibisabwa byingufu mubwubatsi. Byongeye kandi, ubuso bwumurongo wibyuma byafashwe neza bivurwa byumwihariko, kandi kurwanya ruswa nabyo ni byiza, bishobora kwemeza ko icyuma kitazangirika mugihe cyo gukoresha igihe kirekire.