# Bill of materials

Concept · [Business and metrics](https://ecosystem.samcarlton.com/business)

Also called: BOM, BOMs, parts list

A complete list of the parts, materials and quantities needed to build a product.

**For example:** A [hardware startup](https://ecosystem.samcarlton.com/hard-tech)'s bill of materials shows the circuit board costs more than the case, motor and battery combined.

## Connects to (6)

- [Hard tech](https://ecosystem.samcarlton.com/hard-tech): Companies whose product rests on physical engineering or new science, such as machines, materials or devices.
- [CAD](https://ecosystem.samcarlton.com/cad): Computer-aided design.
- [Original equipment manufacturer](https://ecosystem.samcarlton.com/original-equipment-manufacturer): A company that makes products or parts that another company sells or builds into its own products, often under the other company's brand.
- [Gross margin](https://ecosystem.samcarlton.com/gross-margin): The part of each sale you keep after paying the direct cost of making and delivering what you sold.
- [General contractor](https://ecosystem.samcarlton.com/general-contractor): The company that manages a construction project and hires and coordinates the specialist subcontractors, such as electricians and plumbers.
- [ERP](https://ecosystem.samcarlton.com/enterprise-resource-planning): Enterprise resource planning.

Map view: https://ecosystem.samcarlton.com/bill-of-materials