What is the document that shows the component parts and the number of parts needed to make one of an assembly or subassembly called?

The correct answer, which identifies the document showing the component parts and the number of parts needed to make one assembly or subassembly, is a bill of material. A bill of material is a comprehensive list that outlines all the components, parts, and raw materials needed for the manufacturing of a product. It provides detailed information, including part numbers, descriptions, quantities required, and sometimes even the relationships among components. This document is essential for production planning, inventory management, and ensuring that all necessary components are available for assembly.

The role of a bill of material is critical in the manufacturing process, as it helps in organizing and sourcing materials efficiently, thereby minimizing delays and errors during production. It serves as a blueprint for production and is often used alongside other documents that pertain to different aspects of manufacturing.

In contrast, a route sheet primarily details the processing steps or operations required to manufacture an item, not the components needed. A material requirement plan focuses on scheduling and managing inventory levels rather than listing components for a specific assembly. A material requisition is a request for materials typically used at a particular stage of production, rather than a comprehensive list of all components required to complete a product.