Bill of Materials (BOM): Definition and Design

How can you assemble a product if you don’t know exactly what it includes? Imagine manufacturing a bicycle without knowing whether you need two wheels, brakes, or pedals. That’s where the BOM comes in—a key tool that, when used properly, reduces errors, improves production, and speeds up logistics.

What Is a BOM?

A BOM (Bill of Materials) is a document that details all the parts, components, and raw materials required to manufacture a product. It also includes quantities and the assembly hierarchy.

It’s like a recipe—but for building products.

What Is a BOM Used For?

  • Organizes the materials you need.

  • Facilitates inventory control.

  • Prevents production errors.

  • Speeds up logistics planning.

In ecommerce or manufacturing, having a clear BOM makes it easier to know what is needed, when, and in what quantities.

Types of BOM

There is no single way to design a BOM. These are the most common types:

1. Structured (or Multilevel) BOM

Shows main and secondary components. Ideal for complex products.

2. Simple (or Single-Level) BOM

Includes only basic materials. Best for simple products.

3. Engineering BOM

Used by technical teams during product design.

4. Manufacturing BOM

Focused on the actual production and logistics process.

How to Design an Effective BOM

  • Define the final product.

  • List all required components.

  • Detail quantities, codes, and versions.

  • Group materials by phases or levels.

  • Use software to manage it without errors.

A well-designed BOM allows better integration with management systems such as a WMS for ecommerce.

BOM and Logistics: A Direct Connection

When the bill of materials is clear, everything flows:

  • Orders are prepared faster.

  • Overstocking and stockouts are avoided.

  • Material replenishment is automated.

At Amphora Logistics, we know that a well-managed BOM reduces issues and improves operational lead times.

Your BOM Can Drive Your Growth

A company without a clear BOM is navigating blind. With a well-designed list, production can scale without errors. The key is not just having a BOM, but keeping it updated and aligned with your logistics system.