The purpose of rapid prototyping varies, as does the suitable manufacturing method. Appearance validation focuses on surface texture and color; structural validation emphasizes assembly fit and dimensional accuracy; functional testing requires higher material strength.
CNC prototypes offer surface quality and material properties closer to mass-produced parts, making them ideal for appearance validation and assembly verification. Additive manufacturing excels in production efficiency and handling complex geometries, making it better suited for rapid early-stage structural iteration.
When selecting a manufacturing method, first clarify the specific objectives of the prototype. Then choose the appropriate process and materials accordingly to ensure meaningful validation rather than prototyping for its own sake.