Icyitegererezo gifite ibyuma icumi bizaba byiza mubyumba, icyumba cyo kuraramo, cyangwa biro, ariko no mubindi byumba byinshi ushaka gutunganya muburyo bugezweho kandi bukora.Ubwiza bwiza ku giciro gito rwose bizashimisha abashyigikiye ibisubizo bigezweho.