Ibihumyo bya pulasitiki byirabura byirabura bigenewe guhinga ibihumyo. Ubu bwoko bwa pariki busanzwe buhujwe na sisitemu yo kugicucu kugirango itange ibidukikije byijimye kubihumyo. Abakiriya bahitamo kandi ubundi buryo bwo gushyigikira nka sisitemu yo gukonjesha, sisitemu yo gushyushya, sisitemu yo kumurika, hamwe na sisitemu yo guhumeka ukurikije ibisabwa nyirizina.