Gukomera gukomeye ibyuma bizwi cyane mugukata ibikoresho, gupfa no kubumba inganda.Ahanini guhinduranya, gusya hejuru ni byiza, ariko mugihe ukeneye kubona ubuso bwiza burangiye, ugomba kubisya.Ariko kubukomere bukomeye ibyuma bikomeye, ibiziga bisanzwe byangiza bifite imikorere mibi.Nibyiza, ibiziga bya CBN ninziga nziza yo gusya cyangwa gukarisha ibiziga bikarishye.