What APQP actually is
APQP (Advanced Product Quality Planning) is a structured, phase-gated framework for developing a new automotive part so that it consistently meets the customer’s requirements at full production volume. Formalised by the AIAG (Automotive Industry Action Group) and required by name in IATF 16949, APQP breaks a program into five phases, each with defined inputs, outputs and a review gate. It runs from the moment a program is sourced until the part is in stable, capable mass production — and its outputs are precisely the records a PPAP submission packages up.
The point of APQP is simple: move quality effort upstream. Instead of discovering that a bore is uncontrollable during the first production run, APQP forces the team to identify that risk in the FMEA, design a control for it into the control plan, and prove the measurement system and process capability before the customer takes volume. It is planning discipline, not paperwork.
Why APQP exists
Launches fail for predictable reasons: a critical characteristic nobody flagged, a gauge that cannot resolve the tolerance, a process that runs at 4% scrap because capability was never studied. APQP exists to catch each of those before they reach the customer. Three ideas sit under it: cross-functional planning (design, process, quality, tooling and the supplier plan together), the voice of the customer (customer-specific requirements and timing drive the plan), and defect prevention over detection (design the control in, do not inspect the defect out). A Tier-1 or Tier-2 supplier to an OEM is contractually held to an APQP timing chart and status reporting on every new or changed part.
The five phases of APQP
APQP is not a single form — it is five sequential phases, each closing at a gate before the next opens.
| Phase | Focus | Key outputs |
|---|---|---|
| 1. Plan & Define Program | Translate the voice of the customer, business goals and reliability targets into a plan | Design & reliability goals, preliminary bill of material and process flow, preliminary special-characteristics list, product-assurance plan |
| 2. Product Design & Development | Develop and verify the design | DFMEA, design for manufacture & assembly, design verification, prototype build & prototype control plan, drawings and specifications, new equipment/tooling and gauge requirements |
| 3. Process Design & Development | Develop the manufacturing process and its controls | PFMEA, process flow diagram, floor-plan layout, characteristics matrix, pre-launch control plan, process instructions, MSA plan, packaging standards |
| 4. Product & Process Validation | Validate the process through a significant production run | Significant production run, MSA studies, preliminary process-capability study, PPAP, production validation testing, production control plan, quality-planning sign-off |
| 5. Feedback, Assessment & Corrective Action | Reduce variation and capture learning | Reduced variation, improved customer satisfaction, improved delivery & service, effective use of lessons learned and best practices |
Phases one to three are planning and design; phase four is where the plan is proven on real production equipment; phase five is the feedback loop that carries what you learned back into the next program — which is why APQP is drawn as a cycle, not a line.
Outputs and the three control-plan phases
A defining feature of APQP is that the control plan evolves through three stages as the program matures, so the level of control always matches how well the process is understood:
- Prototype control plan — dimensional, material and performance checks during the prototype build, when little is yet proven.
- Pre-launch control plan — enhanced controls after design is frozen but before full volume, often with increased inspection frequency and 100% checks on special characteristics.
- Production control plan — the steady-state plan for mass production, with SPC on the characteristics that matter and defined reaction plans.
Alongside the control plan, phase three produces the PFMEA and the process flow, and phase four produces the MSA studies and the preliminary capability results (typically a Ppk requirement of 1.67 for an initial process study). These are the same documents the PPAP package then submits — nothing is created twice.
The timing chart and phase gates
APQP is governed by a timing chart: a Gantt-style plan that lists every deliverable against an owner and a target date, aligned to the customer’s program milestones (design freeze, tool kick-off, first article, PPAP submission, Job 1). A feasibility commitment opens the program — the manufacturing team formally confirms it can make the part to print, at rate, at cost. From there each phase closes at a gate review where entry and exit criteria are checked before the next phase is authorised. When a gate slips, the timing chart makes the overdue deliverable and its owner visible immediately, rather than at launch when it is too late and too expensive to fix.
Common APQP mistakes
- Treating APQP as a folder, not a plan. Filling in templates the week before PPAP is not planning — the risks were never actually closed.
- Special characteristics that never flow through. A characteristic flagged in the DFMEA/PFMEA must appear on the control plan and be verified — if the chain breaks, the control is fiction.
- Skipping MSA before capability. A capability study on an unqualified gauge measures the gauge, not the process.
- No visible gate status. Without a program dashboard, an overdue gate is only discovered when the launch is already at risk.
How Fast Quality Software runs APQP
Fast Quality Software runs APQP as gated stages rather than a single form, so the plan is a live workflow with owners, dates and status — and its outputs flow straight into PPAP.
Because APQP, PPAP, the FMEA and the control plan all live on one shared platform, the DFMEA a program produces is the same record the PPAP submits and the same risk score an 8D later re-evaluates. See it applied for automotive & IATF 16949 suppliers and precision machining shops, or review indicative pricing in INR.
Frequently asked questions
What are the five phases of APQP?
The five phases of APQP are: 1) Plan and Define Program, 2) Product Design and Development, 3) Process Design and Development, 4) Product and Process Validation, and 5) Feedback, Assessment and Corrective Action. Phases one to three plan and design the product and its process, phase four validates the process on a significant production run and produces the PPAP, and phase five feeds lessons learned back into future programs, which is why APQP is drawn as a cycle.
What is the difference between APQP and PPAP?
APQP is the phase-gated planning process used to develop a new part; PPAP is the submission package that proves the part is approved for mass production. APQP produces the DFMEA, PFMEA, process flow, control plan, MSA studies and capability results; PPAP collects those same documents plus the Part Submission Warrant and submits them to the customer. Put simply, APQP is the work and PPAP is the evidence of that work.
What is an APQP timing chart?
An APQP timing chart is a Gantt-style plan that lists every APQP deliverable against an owner and a target date, aligned to the customer's program milestones such as design freeze, tooling, first article, PPAP submission and Job 1. It is the tool that makes phase gates and overdue deliverables visible, so slippage is caught early rather than at launch.
What are the three phases of the control plan in APQP?
The control plan evolves through three phases: the prototype control plan during the prototype build, the pre-launch control plan after design freeze but before full volume (usually with tighter inspection), and the production control plan for steady-state mass production with SPC and defined reaction plans. The level of control increases as the process is better understood.
Is APQP mandatory for IATF 16949?
Yes. IATF 16949 requires the automotive core tools by name, and APQP is one of them. Automotive OEMs and their Tier-1 and Tier-2 suppliers are held to an APQP process with a timing chart, phase-gate reviews and status reporting on every new or changed part, along with the customer-specific requirements layered on top.