APQP stands for advanced product quality planning. It is the structured process that automotive suppliers use to plan a new part, from the customer’s requirements to stable series production. APQP splits the work into 5 phases with defined deliverables, such as the DFMEA, the PFMEA, the control plan and the PPAP, and checks each phase at a gateway review.
The Automotive Industry Action Group, AIAG, published the first APQP manual in 1994 for Chrysler, Ford and General Motors. Today almost every automotive OEM and tier 1 supplier expects it from its suppliers. This guide explains the meaning of APQP, the 5 phases and their deliverables, how APQP relates to PPAP and FMEA, what changed in the 3rd edition, and where suppliers most often go wrong.
- APQP is a planning framework, not a single document. It ties the core tools together: FMEA, MSA, SPC, PPAP and the control plan.
- The 5 phases run from planning to series production. Each phase ends with a gateway review and a clear list of deliverables.
- PPAP is the proof at the end of phase 4. APQP is the work that makes a clean PPAP possible.
- The 3rd edition of 2024 added sourcing, change management, program metrics and gated management. The control plan is now a separate AIAG manual.
What is APQP?
The full form of APQP is advanced product quality planning. In practice, APQP means that a cross-functional team plans quality into a new product and its manufacturing process before the first part is shipped. Instead of finding problems at the launch, the team finds the risks early, decides how to control them and proves that the process works.
APQP is the umbrella for the other automotive core tools. FMEA finds the risks in the design and the process. MSA, or measurement system analysis, proves that the gauges are good enough. SPC, or statistical process control, shows that the process is stable and capable. PPAP, the production part approval process, is the evidence package the customer approves. The control plan describes how the process is controlled in series production.
APQP = advanced product quality planning. It is a structured method from AIAG for planning a new automotive product and its process in 5 phases, so that the part meets the customer’s requirements from the first delivery.
What are the 5 phases of APQP?
The APQP process has 5 phases. They overlap in practice, because process planning starts before the design is frozen. Each phase has inputs from the previous one, defined outputs and a gateway review where the team and management decide whether the project is ready to move on.
| Phase | Main question | Key deliverables |
|---|---|---|
| 1. Plan and define the program | What does the customer need, and can we deliver it? | Design and quality goals, preliminary bill of materials, preliminary process flow, preliminary special characteristics, product assurance plan |
| 2. Product design and development | Does the design work, and can it be made? | DFMEA, design for manufacturing and assembly, design verification plan and report, prototype control plan, drawings and specifications, team feasibility commitment |
| 3. Process design and development | How will we make it, and what can go wrong? | Process flow diagram, floor plan, characteristics matrix, PFMEA, pre-launch control plan, work instructions, MSA plan, packaging standard |
| 4. Product and process validation | Does the real process make good parts at rate? | Significant production run, MSA results, preliminary process capability, production validation tests, production control plan, PPAP submission |
| 5. Feedback, assessment and corrective action | Is series production stable, and what did we learn? | Reduced variation, customer feedback, corrective actions, updated FMEA and control plan, lessons learned |
Phase 1: Plan and define the program
The team translates the voice of the customer into goals. Inputs are the request for quotation, the customer’s specifications and customer-specific requirements, lessons learned from similar parts and the business plan. The outputs are design goals, reliability and quality goals, a preliminary bill of materials, a preliminary process flow, a preliminary list of special characteristics and the product assurance plan.
Phase 2: Product design and development
If the supplier is responsible for the design, the team develops and verifies it. The main tools are the DFMEA, design reviews and the design verification plan and report, or DVP&R. Tools such as the block diagram and the P-diagram set the scope of the DFMEA. The phase ends with the team feasibility commitment: a signed statement that the part can be made to specification at the required volume.
Phase 3: Process design and development
The team designs the manufacturing process. It draws the process flow diagram, plans the floor layout, analyzes each step in the PFMEA and writes the pre-launch control plan and the work instructions. It also plans the measurement system analysis and the first capability studies, and agrees the packaging with the customer.
Phase 4: Product and process validation
The process is now tested with production tooling, production operators and production materials. The significant production run delivers parts for the MSA, the preliminary capability study and the production validation tests. When the results are good, the supplier releases the production control plan and submits the PPAP for customer approval.
Phase 5: Feedback, assessment and corrective action
APQP does not stop at the start of series production. The team watches scrap, capability and customer complaints, reduces variation and solves problems with methods such as 8D. The lessons learned go back into the FMEA, the control plan and the next project.
What does a supplier have to deliver in APQP?
The exact list depends on the customer, but most OEMs and tier 1 suppliers check the following deliverables at the gateways:
- Feasibility: a signed team feasibility commitment and a risk assessment for the quote.
- Special characteristics: one list, with the customer’s symbols, used in every document.
- DFMEA and design verification: if you own the design, a DFMEA and a completed DVP&R.
- Process documents: process flow diagram, PFMEA and control plan with the same step numbers.
- Measurement: a gauge plan, calibration records and MSA results for the special characteristics.
- Capability: preliminary capability studies, usually Ppk, for the special characteristics.
- Sub-suppliers: APQP and PPAP status for purchased parts and materials.
- PPAP: the complete submission at the level the customer asks for, with a signed part submission warrant.
Requirements for purchased parts are often the weak point. A good supplier quality management process cascades APQP to your own sub-suppliers, with the same gateways and the same evidence.
How are APQP gateways reviewed?
A gateway, or phase gate, is a formal review at the end of a phase. The team shows the status of every deliverable, usually as green, yellow or red, and management decides whether the project goes on, goes on with actions or stops. The customer often runs its own gateways and asks the supplier for a status report before each one.
In a typical automotive project, the APQP phases map to milestones such as supplier nomination, design freeze, tooling release, the run at rate, the PPAP and the start of production, or SOP. Many customers also require a safe launch period with extra checks after SOP.
A deliverable is green only when the evidence exists: a signed document, a measured result, an approved report. A status that says green because the work has started is the most common reason why problems appear at the PPAP.
How does APQP relate to PPAP?
APQP and PPAP are often named together, but they answer different questions. APQP is the plan and the work across the whole project. PPAP is the approval at the end of phase 4, where the supplier proves with records from a significant production run that the process makes good parts.
| Aspect | APQP | PPAP |
|---|---|---|
| Purpose | Plan quality into the product and the process | Prove to the customer that the process makes good parts |
| Scope | The whole project, from quote to series production | One submission at the end of phase 4, and again after changes |
| Output | Deliverables at each gateway | A submission package and a signed part submission warrant |
| Who approves | The project team and management at each gateway | The customer’s supplier quality engineer |
How do DFMEA, PFMEA and the control plan fit into APQP?
The DFMEA belongs to phase 2 and analyzes how the design can fail. The PFMEA belongs to phase 3 and analyzes how each process step can fail. Our DFMEA vs PFMEA comparison explains when each one is needed. The control plan turns the controls from the PFMEA into shop-floor checks: a prototype control plan in phase 2, a pre-launch control plan in phase 3 and a production control plan in phase 4.
These documents must use the same process steps and the same special characteristics. Our guide to the PFMEA and control plan shows how to build one from the other, with an example.
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What changed in the APQP 3rd edition?
AIAG published the APQP 3rd edition in March 2024, together with a separate Control Plan manual, 1st edition. The 2nd edition from 2008 had combined APQP and the control plan in one book. AIAG split them so that the control plan can be updated on its own.
The 3rd edition adds sections on sourcing, change management, APQP program metrics, risk mitigation plans and gated management of the project. The new Control Plan manual adds a safe launch phase and examples for highly automated processes. GM, Ford and Stellantis adopted the new manuals in their customer-specific requirements during 2024, so check which edition your customer asks for.
German OEMs often use the VDA maturity level assurance for new parts instead of, or next to, AIAG APQP. The logic is the same: defined maturity levels, measured at milestones, with the supplier reporting its status.
What are the most common APQP mistakes at suppliers?
- APQP as paperwork: documents are filled in for the customer, but nobody on the shop floor uses them.
- FMEA copied from the last project: the PFMEA does not describe the real process, and the control plan does not match it.
- Weak feasibility review: the team signs the feasibility commitment before it understands the tolerances and the volume.
- Gauges ordered too slowly: MSA cannot be done, so capability results cannot be trusted.
- Sub-suppliers forgotten: a purchased part without PPAP stops the whole submission.
- No owner for open points: red items stay red from one gateway to the next.
- Phase 5 skipped: early complaints are handled one by one instead of with structured problem solving and lessons learned.
The PPAP is a summary of work that is already done. The PFMEA describes the real line, the gauges have passed MSA, capability is proven for the special characteristics and every open point has an owner and a date.
How can an interim APQP engineer help?
Many plants in Central and Eastern Europe take on new parts and new customers faster than they can hire launch engineers. An interim APQP or launch engineer can take over one project or a whole product family, run the gateway reviews, moderate the DFMEA and PFMEA workshops, prepare the PPAP and coach your team so that it can run the next launch alone. When a launch is already in trouble, the same expert can stabilize it and close the open points with the customer.
GQ Interim has delivered 1,550+ projects in manufacturing and industrial companies across Central and Eastern Europe since 2011, for clients such as Stellantis, Porsche, Siemens, Valeo and Magna. Our database holds 7,500+ verified experts, including APQP engineers, launch managers and supplier quality engineers. We are certified to ISO 9001 and TISAX. See our APQP engineer service, or read how to choose an interim manager.
Conclusion
APQP gives an automotive launch a clear structure: 5 phases, defined deliverables and a gateway at the end of each phase. It works when the documents describe the real product and process, when every status is backed by evidence and when the lessons from one launch go into the next. Then the PPAP becomes a formality, and series production starts stable.
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Frequently asked questions
What is the full form of APQP?
APQP stands for advanced product quality planning. It is the AIAG framework that automotive suppliers use to plan a new product and its manufacturing process.
What does APQP mean in quality management?
In quality management, APQP means planning quality into a product before series production, instead of inspecting it in afterwards. A cross-functional team defines the requirements, analyzes the risks, designs the controls and proves that the process works.
What is the APQP process?
The APQP process is a sequence of 5 phases: plan and define the program, product design and development, process design and development, product and process validation, and feedback, assessment and corrective action. Each phase has defined deliverables and ends with a gateway review.
What is the difference between APQP and PPAP?
APQP is the planning process for the whole project. PPAP is the approval step at the end of phase 4, where the supplier submits evidence that its series process makes parts that meet every requirement. A good APQP makes the PPAP straightforward.
What are the APQP core tools?
The automotive core tools are APQP, FMEA, MSA, SPC and PPAP, with the control plan as a key output. APQP is the framework, and the other tools are used inside its phases.
Does IATF 16949 require APQP?
IATF 16949 does not name the AIAG manual, but it requires a documented design and development process for products and manufacturing processes, with a cross-functional approach. Many OEMs prescribe AIAG APQP and PPAP in their customer-specific requirements, so in practice most automotive suppliers must use it.
What is new in the APQP 3rd edition?
The 3rd edition, published by AIAG in 2024, adds sourcing, change management, program metrics, risk mitigation plans and gated management. The control plan moved to a separate AIAG Control Plan manual, 1st edition.
Who is responsible for APQP at a supplier?
A cross-functional team owns APQP, with members from engineering, quality, production, purchasing and logistics. One person, often an APQP engineer, launch manager or program manager, leads the team and reports the status at each gateway.
Is APQP used outside the automotive industry?
Yes. The method comes from automotive, but suppliers in aerospace, rail, agricultural machinery and electronics use the same phases and deliverables, sometimes under other names such as new product introduction.
