PCB Bill of Materials
PCB bill of materials or BOMs or product structure (sometimes BOMs or related list) is the list of raw materials, sub-assemblies, intermediate assemblies, sub-components, parts, and quantities required to produce. A BOM can be used to create communication between manufacturing partners, or limited to a single manufacturer. The bill of materials is usually associated with a production order whose issuance may provide a reservation for the component in the inventory bill of material and a requisition for out-of-stock component.
A BOM can define products as they are designed (engineering bill of materials), as they are ordered (sales bill of materials), as they are built (manufacturing bill of materials), or as they are maintained (service bill of materials or pseudo bill of material). Different types of BOMs depend on business needs and uses. In the processing industry, engineers often use bill of materials as an adjective to refer not to the literal bill, but to the current production configuration of the product to distinguish it from the modified or improved version being researched or tested.
In electronic products, BOM represents a list of components used on printed circuit boards or printed wiring boards. Once the circuit design is done, the BOM list will be passed to the PCB layout engineer, and the component engineer who will purchase components required for the design.