What Is Bill of Materials (BOM) Management? A Guide to Controlling Product Data

A product can fail even when safety-critical control systems and hardware are built correctly, but configured from the wrong data. Configuration data can be wrong even when the parts are correct, and that class of error starts upstream, in the records that define what the product is supposed to be.

For regulated hardware and software teams, the bill of materials (BOM) is the defining record. Accurate, controlled BOM data lets procurement order the right parts and the line build the right revision, while preserving a record of what shipped against what was approved. When it drifts, the failure surfaces as scrap, rework, wrong-part orders, or a recall notice.

This guide covers why BOM data drifts, what that drift costs regulated teams, and the practices that keep a BOM under control.

What Is Bill of Materials (BOM) Management?

Teams manage the bill of materials (BOM) by creating, controlling, revising, and retiring product-structure data across the lifecycle, from early design through end-of-life. A BOM records the parts, assemblies, subassemblies, materials, and build instructions required to produce a product. Every lifecycle phase depends on that data being correct.

How Do EBOM, MBOM, and Service BOM Views Differ?

Complex products carry more than one BOM, and each view answers a different question. The engineering BOM (EBOM) typically resides in a product lifecycle management (PLM) system, while manufacturing uses its manufacturing BOM (MBOM) via enterprise resource planning (ERP):

Multi-level BOMs show parent-child hierarchies of assemblies and components. A change to one low-level component can affect several parent assemblies, so teams need the hierarchy during change control.

How Does a Software Bill of Materials (SBOM) Differ from a Traditional BOM?

EBOM, MBOM, and service BOM views catalog physical parts and assemblies, but none of them inventory the open-source libraries, third-party components, and proprietary code embedded in a product’s software. An SBOM closes that gap: it’s a controlled record of software components, their versions, licenses, and known vulnerabilities, tracked separately from the hardware structure.

Executive Order 14028 set the federal baseline for SBOM adoption in 2021, directing the National Telecommunications and Information Administration (NTIA) to define the minimum data elements an SBOM should include. The Cybersecurity and Infrastructure Security Agency (CISA) has since built on that baseline, and medical device manufacturers face a related expectation directly: FDA premarket submission guidance for device software functions now calls for an SBOM that identifies the commercial, open-source, and off-the-shelf components running in the device, so a reviewer can trace a disclosed vulnerability back to what’s actually in the field.

Hardware BOM and SBOM serve complementary purposes rather than substituting for each other: the hardware BOM controls what parts build the product, while the SBOM controls what code runs on it and where that code needs patching. Teams that already link BOM items to requirements and risk records can extend that same traceability model to software components, so a newly disclosed vulnerability in a third-party library maps back to the affected requirement and verification evidence just as a part substitution would.

Challenges of BOM Management

Configuration drift creates risk on several fronts at once:

• Recall exposure: Configuration errors that escape into the field can create recall exposure, and automotive recall volumes remain a persistent concern across regulated markets, with some recalls tracing back to configuration or documentation errors rather than a physical part defect. In some cases, a single configuration mismatch in a safety-critical module can be enough to create field risk.

• Quality costs: Scrap, rework, and other quality costs can consume a meaningful share of manufacturer revenue at some organizations, and recall remediation adds further expense on top of that.

• Regulatory standing: Design changes must be reviewed, verified, validated as appropriate, and approved before implementation, including evaluation of the effect on the product already delivered. The Food and Drug Administration (FDA) Quality Management System Regulation (QMSR), in effect since February 2, 2026, incorporates International Organization for Standardization (ISO) 13485:2016, which carries this same requirement.

• Audit findings: For aerospace teams, a BOM change-history gap can raise the same audit concern. An auditor who can’t reconcile the BOM’s change history with approved engineering change orders (ECOs) may read the absence as a design control failure, which is why the practices below center on change discipline.

Each of these risks traces back to the same root cause: BOM data that no longer matches what engineering approved. Closing that gap means treating the BOM as a controlled record with a clear change history, not a static file that gets updated informally between departments.

Best Practices for Keeping Your BOM Under Control

Configuration management programs commonly rely on five daily functions, including planning, identification, change management and change control, status accounting, and verification and audit. Those functions are defined in Electronic Industries Alliance (EIA)-649, and the National Aeronautics and Space Administration (NASA) has endorsed that same structure across its own programs. Jama Connect®, a requirements management and traceability platform built for regulated product development, supports these functions from a single connected record, so identification and verification stay tied to the same underlying data instead of scattered spreadsheets.

Centralize Your BOM in a Single Source of Truth

A part-centric BOM turns the product definition into a hierarchical database. Each part in the structure represents a component with its own associated data. Mechanical and electronic parts sit in the same structure as software components, and the associated records include drawings, specifications, and risk analysis documents. When those records attach to one structure, every team references a single definition that reflects the latest iteration.

Deploying PLM without mandating its use leaves spreadsheet habits intact, and managers must change their behaviors along with licensing PLM. Connecting the centralized BOM to specifications and test data builds a connected digital thread that lets auditors see how requirements became designs and designs became shipped items.

Maintain Multiple BOM Views for Different Teams

One BOM structure can’t serve every team on its own. Manufacturing starts from the EBOM, then restructures and augments that content for the build, and deliberate integration keeps the two views aligned. The service BOM adds another layer, since a BOM released by engineering usually doesn’t document after-sales considerations for every market.

Reconciliation between views keeps them aligned, and procurement belongs in that loop. Cost reviews improve when procurement and engineering share the same assumptions about supplier realities and manufacturing constraints, rather than treating target cost as a finance-only number.

Automate Change Control and Approval Workflows

A structured change process starts when an engineering change request (ECR) proposes the change. A formal ECO approves it with electronic signatures and role-based tasks, and a formal change impact analysis precedes implementation, which closes with verification and documentation. Sign-off typically includes design engineering, manufacturing engineering, quality, supply chain, and finance, with customer or regulatory approval added in regulated industries. Auditors look for supporting documentation such as:

• Impact assessment: Before-and-after drawings or specifications plus an analysis of what the change touches downstream.

• Risk analysis updates: Failure Mode and Effects Analysis (FMEA) revision records and, for medical devices, ISO 14971 risk file entries.

• Supplier records: Notifications with tracked acknowledgments, so no supplier learns about a change through an untracked email attachment.

An approved ECO should trigger an automatic BOM update in ERP rather than manual re-keying, which also makes ECO evidence easier to preserve for audits.

Link BOM Items to Requirements and Test Coverage

A BOM lists what’s in the product, while traceability records why each item is there and how it’s verified. Traceability connects requirements, design decisions, risk items, and verification evidence so teams can manage complex systems with confidence. Teams working under safety-critical frameworks such as ISO 26262 rely on automotive safety guidance to connect safety-related requirements with upstream intent and downstream design and verification work.

Electronic component end-of-life notices and incomplete supplier updates can force substitutions that require traceability across requirements, risk items, and test cases. Without recorded links, someone walks that chain by hand, and a missed link stays hidden until the next audit.

Teams often keep requirements in one tool and product structure in PLM, which makes that walk a cross-system exercise. Requirements management software can maintain those links, so impact analysis for a part change starts from existing connections rather than manual reconstruction. Jama Connect keeps those links live within its Traceability Information Model, so a part substitution surfaces every affected requirement, risk item, and test case automatically.

Getting Started with BOM Management

Across regulated frameworks, teams are expected to identify configuration items, review changes before implementation, maintain bidirectional traceability, and document decisions. FDA QMSR, AS9100 configuration management, ISO 26262, and International Automotive Task Force (IATF) 16949 use different terminology, but a disciplined change process can produce evidence that supports each of those expectations. If your BOM reviews start with reconciling versions instead of evaluating changes, connecting product structure to requirements and tests supports that shift. Jama Connect generates that supporting evidence natively across each of these frameworks, so teams aren’t reformatting the same change record for every audit.

Building an Audit-Ready BOM Process

Getting BOM management right isn’t about adding review steps for their own sake. It’s about keeping the EBOM, the MBOM, and every approved change to them tied to the requirements, risk items, and test cases that justify them, so a reviewer can answer what shipped and why without having to reconstruct it by hand.

Jama Connect supports that record through configurable Traceability Information Models (TIMs) that define those relationships. It maintains Live Traceability™ across all linked items, so when an upstream item changes, every linked downstream item is automatically flagged for review. Jama Connect Interchange™, an add-on, extends that record with bidirectional Jira sync and live Excel connectivity for teams working across tools. You can start a free 30-day trial to see how that connected record compares to your own BOM process.

Frequently Asked Questions About BOM Management

What software is used for BOM management?

PLM systems commonly govern BOM authoring and change control. The released BOM then flows to ERP for procurement and inventory execution. Requirements management systems such as Jama Connect sit alongside PLM and help link requirements, risks, and verification evidence to related product records or hardware specifications. Choosing the right RM software depends on your industry’s compliance requirements.

How often should a BOM be updated?

Revisions should follow approved changes rather than run on a fixed schedule. Common triggers include design changes, part substitutions after supply disruptions, component end-of-life notices, quality issues, and new regulatory requirements. A documented engineering change process keeps each trigger tied to a specific approval. Tying each revision to a formal release date in ERP lets pre-change assemblies keep referencing the old BOM until inventory is exhausted, which prevents mix-and-match builds. Periodic BOM audits then catch anything the change process missed.

What is the difference between an engineering BOM and a manufacturing BOM?

The EBOM describes the product as functionally designed and is generated from CAD or EDA tools, organized around design intent. By contrast, the MBOM covers everything needed to build it, adding processing steps, machinery, packaging, and assembly sequence for ERP and shop-floor systems. Phantom assemblies often bridge the two structures during that handoff. They preserve engineering’s logical groupings, while material planning runs counter to the production-realistic structure.

Why is BOM version control important?

Each revision is a frozen baseline that records exactly what the product was at a specific point in time, allowing a team to answer what shipped when a defect or audit question surfaces months later. Multi-level BOMs typically support two different revision approaches. Top-down control re-revises the entire BOM on any change, which is simpler but generates heavy administrative volume, while bottom-up control tracks changes at the component level and keeps revision counts low. Either way, teams need to see what changed, when, who approved it, and why.

This article was authored by Mario Maldari and published on August 7, 2026.