3D printing an object is categorized under which type of Rapid Prototyping Process?

3D printing is categorized as an additive manufacturing process. This means that it creates objects by adding material layer by layer, as opposed to other methods that involve removing material from a solid block. In additive manufacturing, a digital model is used to guide the printer in constructing the item, which allows for complex geometries and designs that would be difficult or impossible to achieve with traditional subtractive methods.

This approach to prototyping is especially valuable in product development and design because it enables rapid iteration and customization without the need for extensive tooling or setup time. Additive processes can significantly reduce waste and material costs, as only the necessary amount of material is used to build the final product. Thus, 3D printing firmly aligns with the principles of additive manufacturing and distinguishes itself from other techniques like machining or transformative processes.