Glossary
What is Bill of Materials (BOM)?
Last updated July 2026
Definition
A bill of materials (BOM) is the structured list of parts and quantities needed to build or maintain something. Accurate BOMs drive accurate demand for spares and materials.
Also known as: BOM
In MRO, equipment BOMs link assets to the spares they consume, which is the basis for criticality and forecasting.
Stale or incomplete BOMs are a hidden cause of both stockouts and excess.
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