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Process selection: constraints before unit price
There is no universally best process. Material performance, geometry, quantity and project stage define feasible routes. Compare options against the same acceptance criteria.
Review checklist
- For CNC, assess material, tool access and critical tolerances; thin walls and deep pockets add constraints.
- For 3D printing, review orientation, supports, finishing and anisotropy. For sheet metal, review thickness, bend radius and assembly.
- Rapid prototypes serve validation goals. Tooling and injection molding require a joint review of tooling investment, release geometry and expected volume.