Kuri moderi isanzwe, shiraho ibice bisohoka kugirango bigenzure ibisohoka 1 na 2 mbere yo gushiraho umugenzuzi.
Kuri Model-Procisry Model, Igice cyo gusohoka kwa relay kimaze gushyirwaho. Kubwibyo, ibikorwa bya gahunda ntabwo ari ngombwa. (Ntugasimbuze nibindi bisohoka.)
Mugihe ushyiraho ibice bisohoka, shushanya uburyo bwimbere mumazu hanyuma ushiremo ibice bisohoka mumasanduku yo kugenzura ibisubizo 1 na 2.