Rapid prototyping is the group of techniques used to quickly fabricate a scale model of a physical part or assembly using three-dimensional computer-aided design (CAD) data. Because these parts or assemblies are usually constructed using additive fabrication techniques as opposed to traditional subtractive methods, the phrase has become synonymous with additive manufacturing and 3D printing.
Prototypes are useful for design improvement, as stepping stones to full production, or for engineering testing. They are meant to be quick and economical, without the need for investment in hard tooling. Many clients need to produce a physical part quickly in order to validate a design or to capture a fleeting sales opportunity.
Rapid prototyping helps companies turn ideas into realistic, high-fidelity proofs of concept that look and work like final products, and guides these products through a series of validation stages toward mass production.