What is referred to as an additive process in manufacturing?

An additive process in manufacturing is characterized by creating objects by adding material layer by layer, which is the essence of techniques like 3D printing and certain types of additive manufacturing. This method contrasts with subtractive processes, where material is removed from a solid block, such as machining or drilling.

The option that describes fabricating parts by adding material aligns perfectly with this definition, as it encompasses the core principles of additive manufacturing. It emphasizes building up shapes and structures through the precise addition of materials, which allows for complex designs and efficient material usage.

In contrast, joining materials by welding focuses on fusion rather than adding material; mixing materials refers to combining substances to achieve a uniform product but does not create a new object layer by layer; and assembling components pertains to putting together finished parts into a complete product, which is a different stage in the manufacturing process.