How does the BOM relate to device traceability?

The BOM is fundamental for device traceability by listing all constituent parts, allowing manufacturers to track component origins, manage supplier quality, and identify affected devices in the event of a recall, which is a key element of post-market surveillance.

Should a software Bill of Materials (SBOM) be part of the overall BOM?

Yes, for devices containing software, an SBOM should be integrated or referenced within the overall BOM to document all software components, including open-source and commercial off-the-shelf (COTS) software, which is crucial for cybersecurity management and compliance with FDA premarket submission guidance for cybersecurity.

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ManufacturingManufacturing & SupplyBOM

Bill of Materials

Structured list of every component, sub-assembly, and quantity needed to manufacture a device.

Reviewed by Christian Espinosa, Founder, Blue Goat CyberLast reviewed May 5, 2026

Definition

BOMs are released as part of the Device Master Record and drive purchasing, planning, costing, and traceability. Engineering, manufacturing, and service BOMs may differ in level of detail. Each BOM line lists the part number, revision, quantity and unit of measure, and often the approved supplier. BOM changes go through formal change control because they can affect validation, UDI and labeling. Many companies manage BOMs in a PLM system and sync them to ERP so manufacturing always builds to the latest released revision.

What the regulation says

Regulators view the Bill of Materials (BOM) as a critical component of the Device Master Record (DMR), essential for establishing and maintaining product conformity, as per 21 CFR Part 820.181 for medical devices in the United States and EU MDR Annex II for devices marketed in the European Union. The BOM supports requirements for design control, production and process controls, and traceability, ensuring that all components and materials used in a medical device meet specified requirements.

What this means in practice

BOM accuracy is foundational for UDI assignment, lot traceability, and recall scoping; errors propagate broadly.

Examples

A medical device manufacturer uses the BOM to ensure that all sterile barrier system components are sourced from approved suppliers and meet specific material requirements, maintaining sterility assurance.
During a product recall, the BOM helps identify all affected devices by tracing specific lots of a faulty component back to the finished products in which they were used.
An auditor reviews the BOM to verify that all critical components listed in the design FMEA are present and correctly specified, aligning with the risk management file.

Common pitfalls

•A common pitfall is failing to maintain an accurate BOM throughout the device lifecycle, leading to discrepancies between the documented and actual device configurations.
•Another mistake is not linking the BOM to other critical quality system elements, such as risk management files or design outputs.
•Inadequate version control of BOMs can result in the use of obsolete or incorrect components in medical device manufacturing.
•Failing to account for software and cybersecurity-related components in the BOM can lead to gaps in addressing software-as-a-medical-device (SaMD) requirements and cybersecurity vulnerabilities.
•Not ensuring that supplier changes are reflected in the BOM can result in non-conforming materials being used in production.

Frequently asked questions

The primary regulatory purpose is to document all components, raw materials, and sub-assemblies of a medical device, facilitating traceability, quality control, and compliance with design and production specifications outlined in regulations like 21 CFR Part 820 and the EU MDR.

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Device Master Record(DMR)

Compilation of records containing the procedures and specifications for a finished device.

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Lot Traceability

Ability to trace materials, processes, and devices forward and backward through the supply chain by lot number.

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Sources

3 sources

Every citation below opens the original document. Each is graded against our source-tier hierarchy so you can see what rests on binding law versus commentary.

Tier 1Binding law and standards· 2Tier 2Regulator guidance and consensus· 1

Link health: 3 verified· last checked 2026-06-20

ISO·2FDA·1

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Category: Manufacturing
Acronym: BOM
Sources: 3
Updated: 5/5/2026

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Structured list of every component, sub-assembly, and quantity needed to manufacture a device.

·BOM accuracy is foundational for UDI assignment, lot traceability, and recall scoping; errors propagate broadly.
·Engineering, manufacturing, and service BOMs may differ in level of detail.
·Each BOM line lists the part number, revision, quantity and unit of measure, and often the approved supplier.

Remember this

Watch out: A common pitfall is failing to maintain an accurate BOM throughout the device lifecycle, leading to discrepancies between the documented and actual device configurations.

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