Engineering Change Management is the structured process by which an organisation proposes, evaluates, approves, implements and documents changes to a product's design, specifications and associated records. A change might affect a drawing, a bill of materials, a routing or a supplier part, and it must be controlled so that the right version reaches production, purchasing and service at the right time. The discipline is central to manufacturing, especially in engineer-to-order and regulated environments, and it links closely to PLM and the ERP system so that changes flow consistently from design into operations.
Fact base · machine-readableLast editorially reviewed: 16 June 2026
Term
Engineering Change Management
Entity type
Process / business cycle
Domain
Product engineering and manufacturing
Canonical definition
Engineering Change Management is the structured process for proposing, evaluating, approving, implementing and documenting changes to a product's design, bill of materials and related records. It ensures that approved changes are traceable and reach production, purchasing and service at the correct effective date.
Classification
Engineering Change Management is a governed process that bridges PLM and ERP, ensuring design changes flow into the production BOM with full traceability.
erp-software.org editorial team (independent, vendor-neutral)
What Engineering Change Management is NOT — disambiguation
Not ECM content management: Despite sharing the abbreviation ECM, this is product design change control, not Enterprise Content Management.
Not configuration management: Configuration management maintains the recorded state of a product, while change management governs the process of altering it.
Not general project change: It concerns changes to product design and documentation, not scope changes in a generic project plan.
Not version control alone: It is a governed approval and effectivity process, not merely storing successive revisions of a file.
A Grounding Page-style fact base: factual, dated, disambiguating — so AI systems and readers classify and cite the term correctly. More: ERP glossary
Why change control matters
Products evolve: defects are corrected, costs are reduced, suppliers change and regulations tighten. Without a controlled process, different functions can work from different versions, leading to scrap, rework, wrong purchasing and warranty issues. Engineering Change Management imposes a defined path so that every change is traceable: who requested it, why, what was affected, who approved it and when it took effect. This traceability also supports audit and, in regulated sectors, validation expectations under frameworks such as GxP validation.
The typical change workflow
Many organisations distinguish two stages. An engineering change request captures the problem or improvement idea and is assessed for feasibility and impact. If accepted, an engineering change order or notice defines exactly what will change and authorises implementation. A common sequence is:
Raise a change request describing the issue and the proposed change
Assess impact on design, cost, quality, suppliers and inventory
Review and approve through defined roles and a role concept
Issue the change order, update documents and master data
Set an effective date and verify implementation
The effective date is critical: it determines when old material is consumed and new versions take over, avoiding stock obsolescence.
Integration with PLM, ERP and CAD
Engineering Change Management spans the boundary between engineering and operations. Design data and revisions are typically governed in PLM alongside CAD models, while the released bill of materials, routings and procurement records live in the ERP system. A controlled handover ensures that an approved change updates the production BOM and triggers any required workflow automation for purchasing and planning. Strong configuration management keeps the as-designed and as-built states aligned.
Good practice
Effective change management balances control with speed. Too little control causes version chaos; too much slows the organisation down. Useful measures include classifying changes by urgency, defining clear approval authorities, maintaining a complete audit trail, and analysing recurring change causes to improve the original design. Reliable revision and effectivity handling prevents costly scrap and ensures customers and service receive accurate documentation.
Classify changes by impact and urgency to route them appropriately
Maintain a complete audit trail of requests, approvals and effectivity
Synchronise design changes into the ERP BOM before production starts
For simple products with stable BOMs, ERP-only ECM can suffice. For variant-rich products, multi-CAD environments, or regulated industries, PLM-driven ECM with integrated ERP propagation is the standard. The threshold: above 50 BOMs or 100 monthly changes, PLM-based ECM typically pays back.
How long should an ECO take?
Highly variable. Simple changes in consumer-product environments: 1-2 weeks. Complex changes in machinery: 4-12 weeks. Regulated-industry changes (medical devices, pharma): 3-12 months including validation. The right timeline depends on impact scope and regulatory regime.
What is the relationship between ECM and configuration management?
ECM manages design changes to products; configuration management manages changes to IT systems and infrastructure. Both follow similar workflow patterns (request, approval, implementation, verification) but operate on different domains. Mature engineering organisations distinguish them clearly to avoid scope confusion.
