Nkibikorwa byizewe cyangwa amashanyarazi igendanwa, amashanyarazi ya mazutu agira uruhare runini mubintu byinshi. Nubwo bimeze bityo ariko, abakoresha benshi bagwa mubice bitandukanye byo gukorera mugihe cyo gutangira. Aya makosa ntabwo azahungabanya imikorere isanzwe ahubwo azagabanya ubuzima bwa serivisi bwibikoresho. Hano hepfo amakosa yiganje yo gutangira.