Engineering Change Request (ECR)
In the competitive world of the automotive industry, managing product and process changes efficiently is critical. One of the most important tools in quality and product development is the Engineering Change Request (ECR).
In this guide, you’ll learn what an ECR is, why it matters in automotive manufacturing, how it works, and how it connects to ECO (Engineering Change Order) and ECN (Engineering Change Notice).
What Is an Engineering Change Request (ECR)?
An Engineering Change Request (ECR) is a formal proposal for modifying a product or process. It is the first step in the change control process in automotive development and manufacturing.
The ECR process ensures that engineering changes are carefully evaluated, approved, and documented before implementation—helping prevent quality issues and costly mistakes.
🎯 Common Reasons for Raising an ECR:
- Design updates or product enhancements
- Material or supplier substitutions
- Cost reduction initiatives
- Manufacturing or tooling updates
- Regulatory compliance (e.g., emissions or safety)
- OEM or customer feedback
- Obsolescence of parts or processes
When Is an ECR Required in the Automotive Industry?
Automotive companies must initiate an ECR whenever a change affects:
- Fit, form, or function
- Product performance or safety
- Manufacturing feasibility
- Customer-specific requirements
- Documentation controlled under IATF 16949
If the change impacts the Production Part Approval Process (PPAP) or a part already in production, both internal and customer approvals may be needed.
Key Components of an Engineering Change Request
A complete ECR document usually includes:
| Section | Description |
|---|---|
| ECR Number | Unique ID for tracking |
| Initiator | Person or department proposing the change |
| Change Description | What is being proposed |
| Reason for Change | Why the change is necessary |
| Impacted Parts/Docs | BOMs, drawings, work instructions |
| Risk Assessment | Cost, quality, lead time, safety impact |
| Timeline | Proposed schedule for implementation |
| Approvals | Signatures from stakeholders and customers |
ECR Process in Automotive: Step-by-Step
Understanding the ECR workflow helps teams align with IATF 16949 and major OEM expectations (e.g., VW, BMW, Ford, Toyota).
🔁 1. Initiation
- A change need is identified (by design, quality, production, or suppliers).
- An ECR form is completed and submitted.
📊 2. Preliminary Review
- Engineering and cross-functional teams (Quality, Production, Purchasing) perform a quick feasibility check.
🔎 3. Impact Analysis
- Determine the effect on:
- Product design or performance
- Safety or compliance
- Cost and validation
- Tooling and production schedules
✅ 4. Approval
- Required approvals may include:
- Product Engineering
- Quality Assurance
- Program Management
- OEM or Tier 1 customer
📤 5. Customer Notification (if needed)
- A formal customer ECR (cECR) may be submitted.
- May trigger PPAP resubmission per AIAG or VDA guidelines.
🛠️ 6. Engineering Change Order (ECO) Issued
- Once the ECR is approved, an ECO outlines how the change will be executed.
⚙️ 7. Implementation
- Update:
- CAD models and BOMs
- FMEA and Control Plans
- Work instructions and process documentation
- Inspection standards
🔒 8. Closure
- Ensure all actions are complete, verified, and documented.
ECR vs ECO vs ECN: What’s the Difference?
| Term | Function | When Used |
|---|---|---|
| ECR | Suggests a change | Initial idea or concern |
| ECO | Orders the change | After ECR is approved |
| ECN | Notifies teams | Inform stakeholders of final change |
These terms are often used together in PLM (Product Lifecycle Management) systems and Quality Management Systems (QMS).
Best Practices for ECR in Automotive
Implementing an effective ECR process reduces risks and enhances efficiency:
✅ Use a standard ECR form or digital template
✅ Involve cross-functional teams early
✅ Link changes to FMEA, Control Plan, and Work Instructions
✅ Maintain revision control in all documents
✅ Ensure customer communication and approval when needed
✅ Use workflow management software for traceability
Tools to Manage ECRs in Automotive
Modern automotive companies use PLM or ECM tools to streamline ECR management:
- Siemens Teamcenter
- PTC Windchill
- SAP PLM
- Autodesk Vault
- Arena PLM
These systems provide audit trails, version control, and integration with CAD and ERP tools.
Under IATF 16949:2016, any product or process change must be:
- Risk-assessed
- Approved by the appropriate stakeholders (internal and external)
- Communicated properly
- Documented and retained
The ECR process supports compliance with clause 8.5.6 (Control of Changes) and enhances customer satisfaction and product traceability.
Common ECR Mistakes to Avoid
❌ Skipping customer notification for functional changes
❌ Implementing change before formal approval
❌ Poorly documented or incomplete ECRs
❌ Ignoring downstream impact (validation, packaging, service)
❌ No link between ECR and updated FMEA/Control Plans
Final Thoughts
The Engineering Change Request (ECR) process is essential for maintaining product quality, managing risks, and satisfying OEM customers. Whether you’re a Tier 1 supplier or an OEM, having a robust, traceable, and collaborative ECR system ensures agility, compliance, and continuous improvement.
By following best practices and using modern tools, automotive organizations can turn engineering changes into a strategic advantage.