Key takeaways
Short answer: APQP and PPAP are two linked pillars of automotive-style quality, and the difference is process versus proof. APQP — Advanced Product Quality Planning — is the structured, phased framework for planning and developing a product and its manufacturing process so quality is built in from the start. PPAP — Production Part Approval Process — is the standardised evidence package, produced within APQP, that proves the process can consistently make parts to specification. APQP is the planning journey; PPAP is the approval gate that says the process is ready. For the failure analysis inside APQP, see DFMEA vs PFMEA.
Advanced Product Quality Planning is a structured framework for developing a product and its manufacturing process in a way that builds quality in from the beginning rather than inspecting it in at the end. Originating in the automotive industry, APQP organises product and process development into phases — from planning and design, through process design and validation, to production and ongoing improvement — with defined inputs, outputs, and tools at each stage. It pulls together the disciplines that prevent defects: design and process FMEAs, control plans, measurement-system analysis, capability studies, and more, sequenced so risks are identified and mitigated before mass production. APQP is the journey: a disciplined, cross-functional process that takes a product from concept to a proven, capable manufacturing process, with quality planning woven throughout.
Production Part Approval Process is the standardised package of evidence that proves a manufacturing process can consistently produce parts meeting all requirements. When a supplier is ready to begin (or change) production, PPAP assembles the documentation that demonstrates readiness: the design records, the process and design FMEAs, the control plan, measurement-system analysis, dimensional results, material and performance test results, initial process-capability studies, sample parts, and a part submission warrant. The customer reviews and approves the PPAP before authorising mass production. PPAP is not a process you run continuously — it is a formal submission and approval gate, the proof that the planning worked and the process is genuinely capable. It is the evidence that says: this process, as set up, will reliably make conforming parts.
The cleanest way to hold the distinction: APQP is the process, PPAP is the proof. APQP is the whole structured journey of planning and developing the product and process so quality is built in; PPAP is a specific deliverable and approval milestone within that journey — the package that demonstrates the planned process can actually deliver conforming parts. PPAP is, in effect, an output of APQP: you do the advanced quality planning, and PPAP is how you prove, at the gate before production, that it succeeded. Treating them as alternatives misunderstands the relationship — you do not choose between APQP and PPAP; you run APQP, and PPAP is the approval that closes it before mass production begins.
A supplier wins a contract to produce a new component. APQP is the journey it now runs: in the planning and design phases it conducts a design FMEA, defines the requirements, and plans the process; in process design it builds a process FMEA and a control plan, sets up the line, and runs measurement-system analysis; in validation it runs trial production and capability studies to confirm the process holds the tolerances. All of that is APQP — the structured, phased planning. Then, before the customer authorises full production, the supplier compiles the PPAP: the FMEAs, control plan, dimensional and material results, capability data, sample parts, and the submission warrant, packaged as proof. The customer approves the PPAP, and mass production is authorised. APQP planned and built capability; PPAP proved it at the gate.
APQP and PPAP are designed to work as one system: the planning framework and its approval gate. Throughout APQP, the team generates exactly the documents and data that PPAP will require — the FMEAs, control plan, capability studies, and measurement analysis are not separate paperwork but the natural outputs of doing the planning properly. PPAP then gathers that evidence into a standardised package and submits it for approval before production. Done well, PPAP is almost a by-product of a thorough APQP — if the advanced planning was real, the proof already exists. Done poorly, teams scramble to assemble a PPAP at the end because the upfront planning was skipped, which is both painful and a sign the quality was never genuinely built in. The two reinforce each other: good APQP makes PPAP straightforward, and the PPAP requirement keeps APQP honest.
APQP and PPAP are upstream quality disciplines, but they connect directly to OEE through the quality factor and process capability. The whole point of APQP is to ensure the process is genuinely capable of making conforming parts before production starts — the same question of being in control and in spec that determines whether the OEE quality factor will be high or a source of constant scrap. PPAP's capability studies are an early measurement of exactly what OEE then tracks continuously in production. A process that passed a real PPAP starts life capable, giving it a healthy quality factor; a process that faked its way through tends to bleed scrap from day one. The upstream rigour and the downstream OEE are two views of the same capability, built on tools like DFMEA and PFMEA.
Fabrico continues, in live production, the capability story that PPAP captures at the gate. Where PPAP proves the process was capable at approval, Fabrico's live OEE and quality data show whether it stays capable in everyday production — trending the good-versus-scrap rate that reveals drift away from the conformance PPAP certified. It turns the one-time approval into ongoing assurance, and surfaces the recurring defects that should feed back into the next revision of the control plan and FMEAs. Book a demo to keep proven capability proven in production.
APQP (Advanced Product Quality Planning) is the structured, phased process for planning and developing a product and its manufacturing process. PPAP (Production Part Approval Process) is the standardised evidence package, produced within APQP, that proves the process can consistently make conforming parts. APQP is the process; PPAP is the proof.
Yes. PPAP is a key deliverable and approval gate within the APQP framework. The documents and data PPAP requires — FMEAs, control plan, capability studies, measurement analysis — are the natural outputs of running APQP properly, then packaged for approval before production.
A PPAP package typically includes design records, design and process FMEAs, the control plan, measurement-system analysis, dimensional results, material and performance test results, initial process-capability studies, sample parts, and a part submission warrant — the evidence the process can make conforming parts.
PPAP is submitted before mass production begins, or before a significant change, as the formal approval gate. The customer reviews and approves the PPAP to authorise production, confirming the process developed through APQP is genuinely capable.
Both ensure a process is capable of making conforming parts before production, the same capability that drives the OEE quality factor. PPAP's capability studies are an early measure of what OEE tracks continuously, so a process that passed a real PPAP starts life with a healthy quality factor.
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