Guide to Advanced Product Quality Planning (APQP)

Looking to learn more about Advanced Product Quality Planning (APQP)? We cover everything from definition to implementation.

APQP is a process designed to provide a clear understanding of customer wants, needs and expectations. This will support you and your business in delivering the best possible products and exceeding these expectations. APQP is one of the five core tools for effective quality management alongside PPAP, FMEA, MSA and SPC, and is particularly valuable in manufacturing industries where there is a risk of production and process failures. The APQP process reduces these risks, provides greater quality control, and increases business success.

In order for you to benefit from implementing APQP into your production processes, you need to understand how it works and where it adds value. In this guide, we will discuss the APQP meaning and definition, the benefits of APQP, when to apply it and the five phases that make it up:

What is APQP?
Why is APQP Important?
When to Apply APQP
The Five Phases of APQP
APQP Checklist
APQP and PPAP

What is APQP?

Advanced Product Quality Planning (APQP) is a structured framework used to guide product and process design in manufacturing. Originally developed by the automotive industry, APQP helps suppliers and manufacturers confirm that new products consistently meet customer requirements, quality standards and regulatory expectations.

At its core, the APQP process focuses on identifying and documenting customer requirements early in development. These requirements are then translated into a detailed product quality plan that guides design, validation and production. By proactively managing risk and aligning quality objectives from concept through launch, APQP reduces anomalies, minimizes rework and improves overall product performance.

APQP also strengthens cross-functional collaboration. A Cross-Functional Team (CFT)—typically including engineering, manufacturing, quality, supply chain and marketing—works together throughout the product lifecycle. This structured communication confirms design decisions, process controls and production planning are aligned to deliver consistent quality and customer satisfaction.

There are five key phases to APQP, which we will examine in more detail further on in the article.

Benefits of APQP

APQP is important for both customer and supplier because there is a structured agreement in place that outlines expectations and specifications for a product. This avoids any confusion or misinterpretation during planning and production, creating a platform for efficient communication.

The business benefits of implementing APQP include:

Product conformity
Improved quality of product
Improved customer service
Improved customer satisfaction
Faster time to market
Transparent communication
On-time products at a low cost
Improved risk mitigation
Improved Design for Manufacturing and Assembly (DFM/A)
Lower cost solutions selected earlier in the process
Necessary changes identified earlier

APQP benefits OEMs dealing with multiple supply chains and suppliers looking to achieve part approval and compliance.

When to Apply APQP

It’s also important to know when and how to implement APQP to maximize benefits from the process. APQP is typically used for New Production Introductions (NPIs) when OEMs and suppliers are working together to develop a new product. It supports product development by using risk-based tools to focus on the design, service, quality control and continuous improvement of a product. Identifying risks early allows teams to act before waiting for a failure to occur.

APQP should also be applied if a product or process is changing after its release, ensuring the risk of the change is managed successfully and doesn’t create any problems.

The Five Phases of APQP

The APQP process is a structured, phased methodology that guides product quality from initial concept through full production and continual improvement. While the five phases are often presented sequentially, they are highly collaborative and overlap in practice. A Cross-Functional Team (CFT)—including engineering, manufacturing, quality, supply chain and other key stakeholders—works together under a defined APQP plan to achieve alignment, risk mitigation and customer satisfaction at every stage.

The APQP process begins with pre-planning, where assumptions, prior knowledge, lessons learned and historical performance data are reviewed. Teams identify expected changes, risks and standard work practices that may impact development. This foundation confirms that the APQP plan is built on realistic inputs and organizational experience before formal planning begins.

In this phase, customer requirements are translated into clear production and quality objectives. The team defines design goals, reliability targets and preliminary process concepts. Early deliverables often include a preliminary bill of materials (BOM), initial process flow diagrams, identification of special characteristics and a product assurance plan. Management support is secured to confirm resources and cross-functional alignment.

This phase establishes the strategic direction of the APQP plan and confirms that customer expectations are fully understood before design work progresses.

Phase 2 focuses on transforming requirements into a validated product design. Engineering teams conduct formal design reviews, feasibility assessments and risk analyses such as Design Failure Mode and Effects Analysis (DFMEA). Tools like Design for Manufacturability and Assembly (DFM/A) and Design Verification Plan and Report (DVP&R) help confirm that the product can be produced reliably at scale.

Key outputs include finalized engineering drawings, material specifications, prototype control plans and defined equipment or tooling requirements. By proactively identifying design risks, this phase strengthens the overall APQP process and reduces costly downstream changes.

Once the product design is defined, the focus shifts to building a capable and controlled manufacturing process. The team develops detailed process flowcharts, floor layouts and Process Failure Mode and Effects Analysis (PFMEA) to identify and mitigate production risks.

Supporting elements of the APQP plan in this phase include control plans, process instructions, packaging standards, Measurement Systems Analysis (MSA) planning and preliminary process capability studies. The goal is to confirm that the manufacturing process can consistently produce parts that meet design intent and customer specifications.

Validation confirms that both the product and the manufacturing process perform as intended under real production conditions. This includes conducting a significant production run, completing capability studies, validating measurement systems and performing production validation testing.

A critical milestone in this phase of the APQP process is the Production Part Approval Process (PPAP) submission. Approval signals that the product and process meet customer requirements and are ready for full-scale production.

After launch, the APQP process transitions into ongoing performance monitoring and continuous improvement. Teams focus on reducing variation, improving delivery performance and increasing customer satisfaction. Corrective actions—both internal and customer-driven—are documented and fed back into future APQP plans as lessons learned.

This final phase reinforces that APQP is not just a launch framework but a continuous quality strategy designed to sustain long-term manufacturing excellence.

APQP Checklist: Key Elements for a Successful APQP Plan

An APQP checklist helps confirm that every critical activity in the APQP process is completed, documented and reviewed before moving to the next phase. It serves as a practical tool for project managers and cross-functional teams to track progress, reduce risk and maintain alignment with customer requirements.

While the exact checklist may vary by organization or industry, a comprehensive APQP checklist typically includes:

Confirmation of customer requirements and design goals
Completion of DFMEA and PFMEA risk assessments
Development of process flow diagrams and control plans
Validation of measurement systems (MSA) and process capability
Prototype builds and production validation testing
PPAP documentation and customer approval
Management review and sign-off at key milestones

By formalizing these steps within the APQP plan, manufacturers improve accountability, strengthen documentation and confirm that nothing is overlooked before product launch. A well-managed APQP checklist supports consistent quality, smoother approvals and more predictable production outcomes.

How is APQP related to PPAP?

Product Part Approval Process (PPAP) is used to highlight the evidence collected throughout the APQP process. This confirms the customer that the supplier is delivering the quality that is expected. PPAP includes details on the production environment, tools, machines, processes, personnel, and conditions that could affect the quality of the part.

There are 18 elements involved in PPAP that determine the success of the first trial run:

Design Documentation
Engineering Change Notice
Customer Engineering Approval
Design Failure Mode and Effects Analysis (DFMEA)
Process Flow Diagram
Process Failure Mode and Effects Analysis (PFMEA)
Control Plan
Measurement System Analysis (MSA)
Dimensional Results
Design Verification Plan and Report (DVP&R)
Initial Process Studies
Qualified Laboratory Documentation
Appearance Approval Report (AAR)
Sample Production Parts
Main Sample
Checking Aids
Customer-Specific Requirements
Part Submission Warrant

The purpose of the process is to minimize errors and confirm both supplier and customer are happy with the result. You can learn more about the Production Part Approval Process (PPAP) by reading our in-depth guide.

APQP requires a lot of work as there are so many different people and supply chains involved. The result is a lot of laborious administration, involving documents, processes and data, and the traditional paper-based workflow can lead to repetitive manual work and human error becoming a risk.

Digitizing APQP can save time with PPAP, FAI, and CMM and leads to repeatable, fast processes. Plex can support businesses looking to digitize their Product Quality Planning (PQP), achieving operational excellence.