Imashini yo gupakira

1 Ubuhanga bwo hejuru: guhitamo umugenzuzi upima neza cyane, kwizerwa neza, ubuziranenge bwiza, ahantu hato ho gukanda, gushyiraho byoroshye kandi byoroshye;

2 Umuvuduko uhinduka: uburyo bwo kugaburira ibikoresho by'ifu ni ukugaburira mu buryo bwa screw, kugaburira vuba no kugaburira buhoro buhoro bigerwaho n'icyuma gipima, kandi umuvuduko wo kugaburira ushobora gushyirwaho uko bishakiye;

3 Imikorere yo kurengera ibidukikije: uburyo bwo gufunga imiyoboro y'amazi bushobora gukumira ivumbi, kunoza aho bakorera no kurinda ubuzima bw'abakozi;

4 Imiterere ikwiye: Imiterere mito, nto, ishobora gukorwamo umubiri udahinduka cyangwa ugendanwa hakurikijwe ibyo umukoresha akeneye;