M'manja youma ayezi pcba kuyeretsa makina ubwino.

1) Kutsika mtengo kwa zida zogulira zida komanso mtengo wotsika wogwiritsa ntchito madzi oundana;

2) Kuyeretsa kwathunthu ndi kuyeretsa pang'ono kungasankhidwe, kuyeretsa kumakhala kosavuta, ndipo ntchitoyo ndi yosavuta komanso yabwino.

3) Kuipitsa zero ndi kutulutsa ziro.