Sisitemu yigenga yigenga igenzura: ikiganza kimwe gishobora kuzamura no kumanuka, gukurura iminara, no guterura kabiri. Irakorwa byoroshye kandi neza.
Ihuriro rirashobora kuzamura no kumanuka uhagaritse kandi uhindagurika hejuru muburebure bwihariye. Ku mwanya wo hasi, biroroshye gushiraho cyangwa kumanura iminara, ishobora gukorwa numuntu umwe.