CQI-19

1. History and Evolution

CQI-19 was developed by the AIAG to address the critical need for systematic sub-tier supplier management in the automotive supply chain. As automotive manufacturing became increasingly complex and globalized, Tier 1 suppliers found themselves dependent on Tier 2, Tier 3, and even Tier 4 suppliers for critical materials, components, and special processes. The standard was created to provide a structured framework for managing this extended supply chain, ensuring that quality requirements flow down and that sub-tier supplier performance is monitored and controlled. First published in 2015 and updated to the 2nd Edition in 2021, CQI-19 emphasizes risk-based supplier management, performance monitoring, and the cascading of customer-specific requirements throughout the supply chain.

2. Scope and Application

CQI-19 applies to all Tier 1 automotive suppliers who source materials, components, or services from sub-tier suppliers. It covers the entire sub-tier supplier management lifecycle, from supplier selection and qualification through performance monitoring, development, and corrective action management. The scope includes risk assessment, quality requirements flow-down, performance metrics, audit programs, and escalation processes. It is particularly critical for suppliers of safety-critical components, complex assemblies, and products where sub-tier supplier quality directly impacts final product performance and customer satisfaction.

3. Definitions and Terminology

4. Fundamental Concepts

The theoretical foundation of CQI-19 is rooted in supply chain management, risk management, and systems thinking. In modern automotive manufacturing, a Tier 1 supplier's product quality is only as good as the quality of its sub-tier suppliers. The theoretical insight is that quality cannot be inspected into a product at the Tier 1 level if the sub-tier supplier has already introduced defects. Therefore, sub-tier supplier management is not optional—it is a fundamental requirement for automotive quality excellence.

The Extended Supply Chain and Quality Cascading

The automotive supply chain is a complex, multi-tier network where quality requirements must cascade from OEM to Tier 1 to Tier 2 and beyond. The theoretical challenge is that as requirements flow down, they can become diluted, misunderstood, or ignored. CQI-19 mandates that Tier 1 suppliers establish formal processes for translating customer requirements into sub-tier supplier requirements, verifying understanding, and monitoring compliance. This includes explicit flow-down of special characteristics, customer-specific requirements, quality metrics, and escalation protocols.

Risk-Based Supplier Management

Not all sub-tier suppliers pose the same level of risk. CQI-19 requires a systematic risk assessment methodology that considers factors such as: product criticality (safety, regulatory), supplier performance history, financial stability, geographic location, single-source dependency, and process complexity. The theoretical insight is that limited resources must be allocated to managing the highest-risk suppliers. High-risk suppliers require more frequent audits, tighter performance monitoring, and proactive development activities, while low-risk suppliers may benefit from streamlined oversight.

Supplier Selection and Qualification

The foundation of effective sub-tier supplier management is rigorous supplier selection and qualification. CQI-19 mandates that Tier 1 suppliers establish formal criteria for evaluating potential sub-tier suppliers, including: quality system certification (IATF 16949, ISO 9001), technical capability, capacity and scalability, financial stability, track record, and special process qualifications (CQI standards). The theoretical requirement is that qualification must be evidence-based, involving on-site audits, sample part evaluation, and capability studies before any production commitment.

Performance Monitoring and Metrics

Once qualified, sub-tier suppliers must be continuously monitored against defined performance metrics. CQI-19 requires tracking of quality metrics (PPM, defect rates, warranty claims), delivery performance (on-time delivery, lead time adherence), responsiveness (8D completion time, communication quality), and cost performance. The theoretical insight is that performance data must be systematically collected, analyzed, and used to drive corrective actions and supplier development. Suppliers consistently failing to meet requirements must be escalated through a formal process culminating in potential disqualification.

When and Where CQI-19 Applies

CQI-19 applies to all Tier 1 automotive suppliers managing sub-tier supply chains. It is particularly critical for suppliers sourcing raw materials (steel, aluminum, plastics), special processes (heat treat, plating, welding), electronic components, and safety-critical parts. Compliance is verified through customer audits and is often a key requirement in OEM supplier quality manuals.

5. Manufacturing Applications

CQI-19 is applied through supplier selection and qualification processes, risk assessment methodologies, performance scorecards, second-party audit programs, supplier development initiatives, and corrective action management systems. It dictates the frequency of supplier audits, the depth of performance monitoring, and the escalation protocols for underperforming suppliers.

6. Implementation Guide

• Establish a formal sub-tier supplier management procedure with clear roles and responsibilities.
• Develop a risk assessment methodology to categorize sub-tier suppliers by risk level.
• Implement rigorous supplier selection and qualification processes with on-site audits.
• Establish performance scorecards tracking quality, delivery, responsiveness, and cost.
• Develop a second-party audit program with frequency based on supplier risk.
• Implement formal requirement flow-down processes ensuring sub-tier suppliers understand expectations.
• Establish escalation protocols for underperforming suppliers with clear corrective action requirements.
• Conduct regular management reviews of sub-tier supplier performance and supply chain risks.

7. Required Documentation

Sub-Tier Supplier Management Procedure, Approved Supplier List, Supplier Risk Assessments, Supplier Qualification Records, Performance Scorecards, Second-Party Audit Reports, Corrective Action Records, Requirement Flow-Down Documentation, and Management Review Minutes.

8. Audit Preparation

Verify that the Approved Supplier List is current and includes only qualified suppliers. Check that risk assessments are documented and that high-risk suppliers receive appropriate oversight. Ensure that performance scorecards are being tracked and that underperforming suppliers are being managed through formal corrective action processes. Review second-party audit records to confirm that audits are being conducted at the required frequency and that findings are being closed. Verify that requirement flow-down is documented and that sub-tier suppliers acknowledge understanding.

9. Industrial Examples

An automotive Tier 1 brake system supplier implemented CQI-19 to address recurring quality issues from sub-tier casting suppliers. By implementing rigorous supplier qualification including on-site CQI-27 audits and establishing performance scorecards with monthly reviews, they reduced sub-tier supplier-related defects by 70% within 18 months and eliminated two major field recalls.

10. Common Mistakes

• Failing to conduct on-site audits before qualifying sub-tier suppliers.
• Not implementing formal requirement flow-down, leading to misunderstood expectations.
• Treating all sub-tier suppliers equally rather than applying risk-based oversight.
• Neglecting to track performance metrics systematically and objectively.
• Failing to escalate underperforming suppliers through formal corrective action processes.
• Not conducting regular management reviews of sub-tier supplier performance and supply chain risks.
• Assuming that IATF 16949 certification alone is sufficient without verifying actual performance.

11. Integration with Other Standards

CQI-19 integrates with IATF 16949 (Clause 8.4 - Control of externally provided processes, products and services), CQI special process standards (CQI-9, CQI-11, CQI-15, etc.), APQP/PPAP (supplier part approval), and customer-specific supplier quality requirements. It is the framework that ensures sub-tier supplier quality is systematically managed throughout the automotive supply chain.

12. Frequently Asked Questions

Q: How deep into the supply chain does CQI-19 apply?
A> CQI-19 applies to all sub-tier suppliers, regardless of tier level. However, the depth of oversight should be risk-based. Tier 2 suppliers (direct suppliers to Tier 1) typically receive the most rigorous oversight, while Tier 3 and Tier 4 suppliers may be managed through Tier 2 with Tier 1 verification. The key is that Tier 1 remains ultimately responsible for ensuring quality throughout the extended supply chain.

13. Certification Preparation

Demonstrate a mature sub-tier supplier management system with risk-based oversight, rigorous qualification processes, and systematic performance monitoring. Show evidence of second-party audits and effective corrective action management. Verify that requirement flow-down is documented and that sub-tier supplier performance is regularly reviewed by management. Prove that supply chain risks are identified and mitigated.

14. Future Trends

The future of CQI-19 involves digital supply chain platforms that provide real-time visibility into sub-tier supplier performance, AI-driven risk prediction that identifies potential supplier failures before they occur, and blockchain-based traceability that ensures requirement flow-down and quality data integrity throughout the extended supply chain. Additionally, sustainability and ESG (Environmental, Social, Governance) criteria are increasingly being integrated into sub-tier supplier evaluation.