In the production process, what are precision-made parts or assemblies often used to trace the outline of a part called?

Precision-made parts or assemblies used to trace the outline of a part are referred to as templates. Templates serve as a guide to ensure that the dimensions and shapes of the parts being produced are accurate and consistent. They allow for the replication of specific designs and facilitate the alignment of components in the manufacturing process.

Templates are especially useful when there is a need for repeated measurement and marking on various materials, ensuring that each part conforms to the established specifications. By providing a physical outline, templates help to improve efficiency, reduce errors, and maintain quality control throughout the production process.

In contrast, blocks typically refer to solid pieces of material that can provide structural support or be used as spacers, while jigs are devices used to hold a piece in place during machining or assembly. Fixtures, on the other hand, refer to devices that hold a workpiece firmly in place, assisting in operations like machining, assembly, or inspection, but they do not specifically provide an outline for tracing. This distinction clarifies why templates are the correct answer for this question.