Gereranya no gutunganya urusyo rusanzwe, gutunganya urusyo rwa CNC nabyo bifite ibimenyetso bikurikira:
1. Ibice bitunganyirizwa bifite imiterere ihindagurika kandi ihindagurika, kandi irashobora gutunganya ibice bifite imiterere igoye cyane cyangwa bigoye kugenzura ingano, nkibice bibumba, ibice byigikonoshwa, nibindi.;
2. Irashobora gutunganya ibice bidashobora gutunganywa cyangwa bigoye gutunganywa nimashini isanzwe, nkibice bigoye bigoramye byasobanuwe na moderi yimibare nibice bitatu byuburinganire;
3. Irashobora gutunganya ibice bigomba gutunganywa mubikorwa byinshi nyuma yo gufatana hamwe no guhagarara;