What process involves removing material using a tool such as a drill or mill machine?

The process that involves removing material using a tool such as a drill or mill machine is referred to as machining. Machining encompasses a range of manufacturing processes in which material is selectively removed from a workpiece to shape it into the desired final form. This includes various techniques like turning, milling, and drilling, each of which uses specific tools designed for particular operations.

Milling, for example, is a specific type of machining where a rotating cutter is used to remove material from a stationary workpiece, while drilling specifically involves creating holes using a drill bit. Turning, on the other hand, is a machining process where the workpiece is rotated against a cutting tool. By recognizing that machining is the overarching term that includes milling and drilling—both methods of material removal—it becomes clear that machining is the correct answer as it describes the entire category and not a singular process.