Component 
The raw material, part, or subassembly that goes into a higher-level assembly
Structure
You create a record for each component that goes into a higher-level assembly in Material Maintenance (see Material Maintenance).
A resistor that goes onto a printed circuit board (PCB), or a PCB that goes into a printer are examples of a component.
See also: Material, Material Table, and BOM Component Tables
Alternate Component
A material that may be substituted for the original component
Assembly
A parent or component (subassembly) that is made up of other components
For example, if you manufacture personal computers (PC), each PC board that goes into the PC belongs to the PC assembly.
Integration
You define numbering patters that uniquely identify components placed on hold using the Component Hold/Release activity in Next Number Maintenance (see Numbering Patterns).