Bill of materials (BOM)
Last updated August 16, 2023
What does BOM mean?
A Bill of Materials (BOM) is a comprehensive list of components, parts, raw materials, and assemblies required to manufacture or assemble a finished product. It serves as a structured inventory of all the items needed to produce a specific product.
What does a BOM consist of?
A BOM typically includes the following information for each item:
- Item Number or Code: A unique identifier for each component or part in the BOM.
- Description: A brief description of the component or part.
- Quantity: The quantity of each component needed to assemble one unit of the final product.
- Unit of Measure: The measurement unit used for each component (e.g., pieces, kilograms, meters).
- Part of Component Number: The manufacturer’s part number or reference code for each component.
- Reference Designators: Identifiers that show where each component is used on the product’s design or schematic.
- Supplier information: Details about the preferred suppliers for each component, including contact information and pricing.
- Notes: Any additional information or instructions related to the component.
What are the types of BOMs?
There are different types of BOMs
- Single-Level BOM: Lists components directly used in the final product
- Multi-Level BOM: Includes all levels of sub-assemblies and components
- Indented BOM: Represents the hierarchical structure of sub-assemblies and components
- Flat BOM: Lists all components at a single level, disregarding sub-assembly relationship