A BOM is a structured, comprehensive list of the materials, components and parts required to manufacture or repair a product, as well as the quantities in which the materials are needed and their names, descriptions and costs. An essential step in manufacturing is completing a bill of materials, or BOM.
10 Key Elements of a Bill of Materials (BOM)
- BOM level
- Part number
- Part name
- Phase
- Description
- Quantity
- Unit measure
- Procurement type
- Reference designator
- BOM notes
BOM Structure
BOMs may be structured in one of the following two ways:
Single-level bill of materials
In a single-level BOM, each part that will make up the product or asset is shown once, along with the quantity needed.
Multi-level Bill of Materials
In contrast to the single-level bill of materials, a multi-level BOM shows the relationship (sometimes called parent-child) between components, sub-assemblies and assemblies.
Both single- and multi-level BOMs may be created for use at various stages of the product development lifecycle.
Types of Bill of Materials
1.Engineering Bill of Materials (EBOM)
2.Sales Bill of Materials (SBOM)
3.Manufacturing Bill of Materials (MBOM)
4.Configurable Bill of Materials
5.Production Bill of Materials
6.Assembly Bill of Materials
7.Template Bill of Materials
Key Takeaways
- A bill of materials (BOM) is a structured list identifying all materials and components required to construct a product, as well as the instructions for procuring and using the materials.
- A BOM helps organizations plan purchases of materials, estimate costs, and minimize production delays and waste.
- An accurate, complete BOM helps identify the cause of a product failure and work quickly to replace the faulty parts, materials and components.
- BOMs come in a range of forms and types. They can be single- or multi-level. Some of the most common types are engineering, manufacturing and sales BOMs.