Kugeza ubu, ibisanzwe bikoreshwa cyane guhuza abadafite akazi harimo cyane cyane guteranya guhuza abadafite icyo bakora, guhuza abadafite aho bahurira, hamwe no kudakora neza. Umurongo wo hagati wabatagira akazi nu murongo wo hagati wumukandara wa convoyeur uragororotse, umurongo wo hagati wuwudakora nu murongo wo hagati wumukandara wa convoyeur ntabwo ugororotse, kandi imizingo 3 yimigozi hamwe nuduce 2 duto duhagaritse dushyirwa kumurongo wo hejuru, kandi umuhanda wo hepfo uhuza kumurongo wo hagati. Ibiti byo hejuru no hepfo byahujwe hamwe nigitereko cyinyuma, kandi mugihe umukandara wa convoyeur uhujwe nabi, urumuri rwo hejuru rusunikwa kugirango ruzenguruke ruzengurutse umurongo ugana ku kintu runaka, muri iki gihe, umutegarugori uhuza akoresha akanyabugabo ka F ku mukandara wa convoyeur, uteza umukandara wa convoyeur nyuma yo kudahuza kugirango uhite usubira mu mukandara wa convoyeur. Irangwa no kongeramo ibyuma 2 byerekana ibyuma bishingiye ku guhuza imbere, bishobora guhagarika mu buryo butaziguye kandi bikabuza guhuza umukandara wa convoyeur mu gihe habaye ukudahuza gukomeye, guteza imbere guhuza umukandara wa convoyeur, no gukora neza guhuza neza.