What is APQP?

APQP stands for Advanced Product Quality Planning. It is a structured approach used mainly in the automotive industry to plan product and process quality from the early stages of development through validation, production launch and continuous improvement.

APQP brings different functions together so that customer requirements, product risks, process risks, resources, validation activities and production readiness are considered before mass production.

In simple words, APQP helps an organization answer five questions:

• What does the customer require?
• Can we manufacture the product?
• What can go wrong?
• How will we control the risks?
• Is the product and process ready for production?

For an automotive supplier, APQP is therefore much more than completing documents. The real purpose is to prevent problems before they reach the customer.

APQP is closely connected with important automotive quality tools such as:

• FMEA
• Process Flow Diagram
• Control Plan
• MSA
• SPC
• PPAP
• Special Characteristics
• Customer-Specific Requirements

The exact requirements applicable to a project should always be determined from the customer requirements, contractual requirements and applicable industry manuals.

Why is APQP Important?

Launching a new automotive component without proper planning can create problems such as:

• Customer complaints
• High rejection
• Scrap and rework
• Production delays
• Tooling problems
• Capacity problems
• Measurement-system issues
• Process capability problems
• PPAP delays
• Expensive engineering changes

APQP provides a systematic way to identify these problems early.

For example, imagine that an automotive supplier receives an order for a new fastener.

During feasibility, the company discovers that its existing machine cannot consistently achieve the required tolerance.

If this is discovered before tooling and production planning are finalized, the organization can select another machine or develop an alternative process.

If the same problem is discovered after SOP, the cost and impact can be much higher.

This is the basic philosophy of APQP: identify and prevent problems early rather than correct them after production starts.

What Are the 5 Phases of APQP?

APQP is commonly explained through five phases:

Phase	APQP Phase	Main Objective
Phase 1	Plan and Define Program	Understand customer requirements and plan the project
Phase 2	Product Design and Development	Develop and validate the product design
Phase 3	Process Design and Development	Develop a capable manufacturing process
Phase 4	Product and Process Validation	Validate the product and production process
Phase 5	Feedback, Assessment and Corrective Action	Monitor performance and improve the process

The five phases are connected rather than independent activities.

A typical relationship is:

Customer Requirements → Feasibility → Product Design → Process Design → Risk Analysis → Validation → PPAP → Production Launch → Feedback

APQP 3rd Edition – Important Update

AIAG published the APQP 3rd Edition in March 2024.

The updated APQP manual introduced or expanded areas such as:

• Sourcing
• Change management
• APQP program metrics
• Risk assessment and mitigation
• Gated management
• Part traceability
• Additional checklists and examples
• Updated approaches to product-development planning

One important change is that Control Plan content was separated from the APQP manual and is now covered in a standalone AIAG Control Plan manual.

This is important because many organizations still use older APQP formats and procedures.

When reviewing or updating your APQP system, check:

• Current customer requirements
• Customer-specific requirements
• Current AIAG requirements applicable to your organization
• Internal APQP procedure
• Change-management requirements
• Risk-management process
• Control Plan process
• Traceability requirements
• Project gates
• Required customer submissions

Do not assume that an old APQP format automatically satisfies the latest requirements.

Phase 1 – Plan and Define Program

Phase 1 establishes the foundation of the APQP project.

The team needs to understand the customer requirements, evaluate feasibility and define the resources and activities necessary for successful development.

Major activities in Phase 1

• Review RFQ and customer requirements
• Review drawings and specifications
• Identify customer-specific requirements
• Identify statutory and regulatory requirements
• Conduct manufacturing feasibility
• Form the Cross-Functional Team
• Nominate the project leader
• Define responsibilities
• Prepare APQP responsibility matrix
• Prepare APQP timing plan
• Review previous quality problems
• Identify lessons learned
• Identify special characteristics
• Review material requirements
• Review capacity requirements
• Prepare preliminary process flow
• Identify tooling and equipment requirements

Typical Phase 1 documents

• Customer requirements
• Feasibility study
• APQP timing plan
• APQP responsibility matrix
• Preliminary process flow
• Preliminary BOM
• Risk assessment
• Customer-specific requirements
• Previous project lessons learned
• Initial project schedule

APQP Timing Plan

The APQP timing plan is one of the most important project-management documents.

It should identify:

• Activity
• Responsible person
• Planned date
• Actual date
• Status
• Customer milestone
• Sample submission
• Tooling completion
• Trial production
• Validation
• PPAP
• SOP

The timing plan should be reviewed regularly.

A timing plan that is prepared once and never reviewed does not provide effective project control.

Phase 2 – Product Design and Development

Phase 2 focuses on developing a product that meets customer requirements.

The exact activities depend on whether the organization has product-design responsibility.

Where the customer owns the design, the supplier may have limited design responsibility but still needs to understand and control the requirements applicable to its activities.

Major Phase 2 activities

• Review product requirements
• Review drawings
• Review specifications
• Identify design requirements
• Conduct design reviews
• Prepare DFMEA where applicable
• Identify material requirements
• Identify performance requirements
• Develop prototypes
• Conduct prototype testing
• Identify equipment requirements
• Identify tooling requirements
• Identify gauge requirements
• Conduct design verification where applicable
• Conduct design validation where applicable
• Review design changes

Product design risks

Typical design-related risks can include:

• Incorrect dimensions
• Insufficient strength
• Material selection
• Functional failure
• Durability problems
• Corrosion
• Assembly problems
• Performance failure

Where design responsibility exists, these risks should be systematically evaluated.

Phase 3 – Process Design and Development

Phase 3 is particularly important for manufacturing organizations.

The objective is to develop a manufacturing process that can consistently produce conforming products.

A good process-development activity should connect:

Process Flow → Risk Analysis → Process Controls → Inspection → Work Instructions → Validation

Major Phase 3 activities

• Develop Process Flow Diagram
• Review manufacturing sequence
• Conduct PFMEA
• Identify process risks
• Identify special characteristics
• Develop tooling
• Develop fixtures
• Develop gauges
• Define inspection methods
• Prepare inspection standards
• Develop work instructions
• Define process parameters
• Establish process controls
• Evaluate error-proofing opportunities
• Develop training requirements
• Conduct supplier development where required
• Conduct tooling trials
• Produce development samples
• Sample submission & approval

Process Flow Diagram

The Process Flow Diagram should represent the actual manufacturing sequence.

For example:

Raw Material → Cutting → Forming → Machining → Heat Treatment → Surface Treatment → Inspection → Packing – Despatch

Every significant manufacturing operation should be considered during risk analysis and process-control development.

PFMEA

PFMEA is used to identify and evaluate potential process failures.

For example, during a threading operation, potential problems may include:

• Incorrect thread size
• Damaged thread
• Incomplete thread
• Tool wear
• Incorrect machine setting

The process team should identify appropriate prevention and detection controls.

Control Plan

Control Plan documentation should define the applicable process controls, inspection requirements, reaction plans and responsibilities.

The organization should ensure that relevant requirements are properly connected across:

• Process Flow
• PFMEA
• Control Plan
• Work Instructions
• Inspection Standards

A common APQP problem is that all documents exist but do not agree with each other.

For example:

Process Flow shows 10 operations, but PFMEA covers only 8 operations.

This should trigger a review.

Phase 4 – Product and Process Validation

Phase 4 determines whether the product and manufacturing process are ready for production.

This phase converts the development work into actual production evidence.

Major activities

• Production trial
• Pilot production
• Product testing
• Process validation
• Measurement System Analysis
• Process capability studies
• SPC implementation where applicable
• Product audit
• Process audit
• Packaging validation
• PPAP preparation
• Customer submission
• Customer approval
• Production readiness review

MSA

Before relying on measurement results, the measurement system should be evaluated according to the applicable requirements. (Measurement System Analysis)

Typical considerations include:

• Gauge suitability
• Repeatability
• Reproducibility
• Bias
• Stability
• Linearity, where applicable

Process Capability

Where applicable, capability studies help determine whether the process can meet specified requirements consistently.

Capability analysis should be performed using an appropriate methodology and representative data.

SPC

SPC (Statistical Process Control) can be used to monitor process variation and identify unusual process behavior.

It is particularly useful for characteristics where statistical monitoring is appropriate.

Phase 5 – Feedback, Assessment and Corrective Action

APQP should not end simply because PPAP has been approved.

After production launch, the organization should monitor actual performance.

Major activities

• Monitor customer feedback
• Monitor customer complaints
• Monitor internal rejection
• Monitor scrap
• Monitor rework
• Review process performance
• Implement corrective actions
• Verify effectiveness
• Capture lessons learned
• Update risk documentation where required
• Improve process controls
• Complete production handover

The purpose is to convert production experience into knowledge that can improve future projects.

APQP Phase-Wise Documents List

The exact documents depend on the product, customer and organization. However, the following is a useful practical reference.

APQP Phase	Typical Documents
Phase 1	Customer requirements, feasibility study, CFT, responsibility matrix, timing plan, preliminary process flow, risk assessment, lessons learned
Phase 2	Design records, design review, DFMEA where applicable, prototype plan, design validation, material requirements
Phase 3	Process Flow, PFMEA, process controls, Control Plan, work instructions, inspection standards, tooling plan, gauge plan
Phase 4	Trial-production records, MSA, capability studies, SPC records, validation results, audits, PPAP
Phase 5	Customer feedback, complaints, corrective actions, lessons learned, launch monitoring, production handover

Common APQP Documents

A practical APQP document list may include:

• Customer requirements
• Feasibility study
• APQP responsibility matrix
• APQP timing plan
• BOM
• Design records
• DFMEA where applicable
• Prototype plan
• Process Flow Diagram
• PFMEA
• Control Plan
• Work Instructions
• Inspection Standards
• Tooling Plan
• Gauge Plan
• MSA
• SPC
• Process Capability Study
• Product Validation
• Process Validation
• PPAP
• Customer Approval
• Lessons Learned
• Corrective Action

Not every project requires every document.

Customer-specific requirements and the applicable AIAG guidance should be used to determine the required deliverables.

APQP Checklist – 50+ Practical Points

Use the following checklist during APQP reviews.

Phase 1 Checklist

1. ☐ Customer requirements reviewed
2. ☐ Latest drawing available
3. ☐ Customer specifications reviewed
4. ☐ Customer-specific requirements identified
5. ☐ Regulatory requirements identified
6. ☐ Feasibility study completed
7. ☐ Manufacturing capacity evaluated
8. ☐ Initial risk assessment completed
9. ☐ Cross-Functional Team formed
10. ☐ Project leader nominated
11. ☐ Responsibilities defined
12. ☐ APQP responsibility matrix prepared
13. ☐ APQP timing plan prepared
14. ☐ Customer milestones identified
15. ☐ PPAP target date identified
16. ☐ SOP target date identified
17. ☐ Previous quality problems reviewed
18. ☐ Lessons learned considered
19. ☐ Preliminary process flow prepared
20. ☐ Special characteristics identified

Phase 2 Checklist

21. ☐ Product requirements reviewed
22. ☐ Design responsibility defined
23. ☐ Design records controlled
24. ☐ Design review completed
25. ☐ DFMEA completed where applicable
26. ☐ Design risks reviewed
27. ☐ Material requirements confirmed
28. ☐ Performance requirements confirmed
29. ☐ Prototype requirements identified
30. ☐ Prototype testing planned
31. ☐ Design verification completed where applicable
32. ☐ Design validation completed where applicable
33. ☐ Equipment requirements identified
34. ☐ Tooling requirements identified
35. ☐ Gauge requirements identified

Phase 3 Checklist

36. ☐ Process Flow Diagram prepared
37. ☐ Process Flow covers manufacturing operations
38. ☐ PFMEA prepared
39. ☐ PFMEA reviewed by CFT
40. ☐ Special characteristics identified
41. ☐ Applicable characteristics reflected in controls
42. ☐ Tooling plan prepared
43. ☐ Fixture requirements identified
44. ☐ Gauge requirements identified
45. ☐ Inspection methods defined
46. ☐ Inspection standards prepared
47. ☐ Work instructions prepared
48. ☐ Process parameters identified
49. ☐ Process controls defined
50. ☐ Control Plan prepared as applicable
51. ☐ Reaction plans defined
52. ☐ Error-proofing opportunities evaluated
53. ☐ Operator training planned
54. ☐ Supplier development completed where required
55. ☐ Development samples produced & customer approval

Phase 4 Checklist

56. ☐ Production tooling available
57. ☐ Production equipment available
58. ☐ Production gauges available
59. ☐ Trial production completed
60. ☐ Measurement system evaluated
61. ☐ MSA completed where applicable
62. ☐ Process capability evaluated
63. ☐ SPC implemented where applicable
64. ☐ Product testing completed
65. ☐ Process validation completed
66. ☐ Required audits completed
67. ☐ Packaging validated
68. ☐ PPAP documentation prepared
69. ☐ PPAP submitted
70. ☐ Customer approval obtained

Phase 5 Checklist

71. ☐ Launch performance monitored
72. ☐ Customer feedback collected
73. ☐ Customer complaints reviewed
74. ☐ Internal rejection reviewed
75. ☐ Scrap and rework analyzed
76. ☐ Corrective actions implemented
77. ☐ Effectiveness verified
78. ☐ Lessons learned captured
79. ☐ Risk documents updated where required
80. ☐ Production handover completed

APQP Checklist PDF

A useful APQP checklist PDF should be more than a simple list.

I recommend using the following columns:

Sr. No.	APQP Activity	Responsibility	Planned Date	Actual Date	Status	Evidence/Remarks

This makes the checklist useful for:

• APQP project reviews
• Supplier development
• Internal audits
• Customer audits
• New product development
• Project meetings
• Production readiness reviews

Download Free APQP Checklist PDF

Practical APQP Example – Automotive Fastener

Let’s consider a company developing a new automotive fastener.

The customer provides:

• Product drawing
• Material specification
• Dimensional requirements
• Performance requirements
• Packaging requirements
• Delivery requirements
• Customer-specific requirements

Phase 1

The company conducts a feasibility study and discovers that the existing machine has limited capacity.

The CFT therefore evaluates:

• Machine capacity
• Tooling
• Material availability
• Inspection requirements
• Production manpower
• Delivery requirements

A timing plan is prepared.

Phase 2

Where design responsibility applies, the team evaluates:

• Strength
• Material
• Dimensions
• Thread requirements
• Durability
• Corrosion resistance

Design risks are evaluated and applicable validation activities are planned.

Phase 3

The manufacturing process may be:

Raw Material → Cutting → Heading → Threading → Heat Treatment → Surface Treatment → Inspection → Packing

The team prepares:

• Process Flow
• PFMEA
• Control Plan
• Work Instructions
• Inspection Standards
• Tooling
• Gauges

Phase 4

The company conducts representative production trials.

It evaluates:

• Product dimensions
• Material properties
• Thread quality
• Surface treatment
• Measurement systems
• Process capability
• Product performance

The applicable PPAP submission is prepared.

Phase 5

After launch, the organization monitors:

• Customer complaints
• Internal rejection
• Scrap
• Rework
• Delivery performance
• Process capability
• Customer feedback

Lessons learned are documented for future projects.

APQP vs PPAP

APQP and PPAP are closely connected, but they are not the same.

APQP	PPAP
Advanced Product Quality Planning	Production Part Approval Process
Broader planning framework	Submission and approval process
Begins early in product development	Becomes particularly important during validation and launch
Covers product and process planning	Provides evidence that requirements have been met
Cross-functional	Requires defined submission evidence
Focuses on prevention and readiness	Focuses on customer approval

Easy way to remember

APQP = Plan and develop

PPAP = Demonstrate and obtain approval

PPAP should therefore not be treated as a last-minute documentation activity.

APQP Responsibility Matrix

APQP involves multiple departments.

Depending on the project, the team may include:

• Quality
• Production
• Engineering
• Purchase
• Supplier Quality
• Tooling
• Maintenance
• Logistics
• Management
• Sales/Marketing

APQP responsibility matrix should make it clear who owns each activity.

For example:

Activity	Quality	Engineering	Production	Purchase
Feasibility	C	R	C	C
PFMEA	R	C	C	–
Tooling	C	R	C	C
MSA	R	C	C	–
Supplier Development	C	C	–	R

The exact responsibility should be defined according to the organization’s structure.

Common APQP Mistakes

1. Starting APQP too late

APQP should begin during the early stages of the project.

2. Treating APQP as paperwork

Documents should support decision-making and risk reduction.

3. Poor linkage between documents

Process Flow, FMEA and process controls should be consistent.

4. Copying old FMEA without review

Previous FMEA can provide useful lessons, but every new project should be evaluated for its specific risks.

5. Ignoring customer-specific requirements

Customer requirements may significantly change APQP activities.

6. Preparing the timing plan but not monitoring it

Project delays should be identified and escalated early.

7. Involving only the Quality Department

APQP is a cross-functional activity.

8. Treating PPAP as the end of APQP

Feedback and lessons learned remain important after launch.

APQP Audit Checklist

During an APQP audit, ask:

Customer Requirements

• Are customer requirements available?
• Are the latest drawings controlled?
• Are CSRs identified?
• Are special characteristics identified?

Project Planning

• Is the CFT formed?
• Are responsibilities defined?
• Is the timing plan available?
• Are delays monitored?

Risk Management

• Is feasibility documented?
• Is risk analysis completed?
• Are previous problems considered?
• Are actions tracked?

Process Development

• Is Process Flow available?
• Is PFMEA available?
• Are process controls defined?
• Are work instructions available?

Validation

• Is MSA completed where applicable?
• Is capability evaluated?
• Is product validation completed?
• Is PPAP approved?

Production Launch

• Are operators trained?
• Are gauges available?
• Are production documents released?
• Are reaction plans available?
• Are launch issues monitored?

Frequently Asked Questions About APQP

What is the full form of APQP?

APQP stands for Advanced Product Quality Planning.

What are the 5 phases of APQP?

The five commonly described phases are:

1. Plan and Define Program
2. Product Design and Development
3. Process Design and Development
4. Product and Process Validation
5. Feedback, Assessment and Corrective Action

What is an APQP checklist?

An APQP checklist is a structured list of activities used to verify that important product-development and launch activities have been completed.

What documents are required for APQP?

Typical documents include feasibility study, timing plan, responsibility matrix, Process Flow, FMEA, Control Plan, work instructions, MSA, SPC, capability studies, validation records and PPAP. The exact requirements depend on the project and customer.

What is APQP Phase 1?

Phase 1 is Plan and Define Program. It focuses on customer requirements, feasibility, project planning, team formation and initial risk identification.

What is APQP Phase 3?

Phase 3 is Process Design and Development. It focuses on developing the manufacturing process, process risks, tooling, gauges and process controls.

What is APQP Phase 4?

Phase 4 is Product and Process Validation. It validates the product and manufacturing process before production launch.

Is APQP mandatory?

APQP requirements depend on applicable customer, contractual and organizational requirements. Automotive OEMs and Tier-1 customers commonly require structured APQP activities from their suppliers.

What changed in APQP 3rd Edition?

The 3rd Edition introduced or expanded areas including sourcing, change management, program metrics, risk assessment and mitigation, gated management and part traceability. Control Plan content was also separated into a standalone manual.

Is Control Plan part of APQP?

Control Plan remains closely connected with APQP and process development, but AIAG now publishes Control Plan as a separate manual.

APQP Golden Rules for Quality Professionals

If you work in automotive quality, remember these ten practical rules:

1. Start APQP early.
2. Understand customer requirements before planning activities.
3. Form a strong Cross-Functional Team.
4. Assign responsibility for every activity.
5. Use lessons learned from previous projects.
6. Maintain consistency between Process Flow, FMEA and process controls.
7. Validate measurement systems before relying on measurement results.
8. Validate the process using representative production conditions.
9. Do not treat PPAP as the whole APQP process.
10. Use production feedback to improve future projects.

Conclusion

APQP is not simply a collection of quality documents.

It is a structured method for planning, developing, validating and improving products and manufacturing processes.

A strong APQP system connects:

Customer Requirements → Feasibility → Product Development → Process Development → Risk Management → Validation → PPAP → Production Launch → Feedback

For automotive suppliers, the objective should not be:

“Complete the APQP documents.”

The objective should be:

“Use APQP to prevent problems, reduce launch risk and develop a stable production process.”

The APQP 3rd Edition also makes it important for organizations to review their existing APQP procedures, particularly in areas such as sourcing, change management, risk mitigation, program metrics, gated management and traceability.

For practical implementation, start with customer requirements and feasibility, build a cross-functional team, prepare the timing plan, develop product and process risks, validate the process and then use production feedback to improve.

A well-managed APQP project can make new-product development much more systematic and reduce the number of surprises during production launch.

If you are working as a Quality Engineer, APQP Coordinator, Supplier Quality Engineer, Production Engineer or QMS professional, learning how these activities connect is much more valuable than simply memorizing the five APQP phases.