PPAP, APQP and 8D for Businesses That Make Chemistry, Not Widgets
The automotive quality toolset was written for machined parts and stamped metal. When your product is a formulation — a viscosity, a cure profile, an open time — the customer's PPAP checklist and 8D template still arrive, and 'that question doesn't apply to us' is not an answer that keeps the business. There is a right way to map these tools onto batch chemistry.
PPAP when the "part" is a batch
A Production Part Approval Process submission asks you to demonstrate that your production process reliably makes what the customer approved. For a formulation, the honest mapping looks like this: the design records are your formulation and specification; the process flow and control plan describe your batch process from raw material intake to fill-off; the measurement systems analysis covers the lab methods that release the batch; and the capability study runs on the specification-critical properties — viscosity, solids, density, cure — across real production batches, not one golden batch. The commonest failure we see is a submission built from templates that talk about dimensions, which tells the customer's SQE at a glance that nobody translated.
APQP that survives contact with a launch
Advanced Product Quality Planning is, stripped of the acronym, a disciplined answer to "how will you get this product to reliable series production, and how will you know?" For a chemical product the plan has to carry the things automotive templates forget: raw material qualification and second sources, scale-up from pilot to production vessel, stability and shelf-life evidence, and packaging compatibility. Scale-up is where launches actually fail — a formulation that behaves in a 5-litre pilot vessel and misbehaves at 2 tonnes is a process design problem, and it belongs in the APQP timing plan, not in a post-launch 8D. Process scale-up and industrialisation support is part of what we do.
8D that closes complaints instead of managing them
An 8D is only as good as its D4 — the root cause. Chemical complaints make this hard: the failure often appears at the customer's process, weeks after your batch released in-spec. A credible D4 for a formulation complaint usually has to consider batch data trends, raw material lot changes, storage and transport conditions, and the customer's own application window — with evidence, not supposition. We run the analysis with your team using the same engineering discipline described on our audit rescue page, and write the 8D so the customer's quality team can close it without a second round of questions.
How this connects to your ISO 9001 system
PPAP, APQP and 8D are not a parallel universe; they are customer-specific applications of clauses 8.3, 8.5 and 10.2. Done well, one set of process controls and one improvement loop feeds both your certificate and your customer scorecards. Done separately, your team maintains two systems and believes neither. We build the single version — see how we work on the methodology page, and our fixed fees on the services page.
Get a submission or response unstuck
Whether it is a first PPAP for a new customer, an APQP plan the customer keeps rejecting, or an 8D due back in days, we work alongside your team at our published day rates. Teresa has prepared and defended these documents from the supplier side of automotive chains — this is practice, not theory.