A formal quality agreement is overkill for a standard item bought occasionally and genuinely useful for anything custom or recurring. The version worth having is one page, not twenty – and its value is almost entirely in what it says about defects, not in what it says about quality systems.
When it is not worth it
Standard sizes, occasional purchases, non-critical applications. The terms on the order confirmation cover it. Adding a quality agreement to a five-hundred-pound order costs more in time than it saves.
When it is
Custom dimensions or tooling. Recurring supply, where the same item is bought repeatedly and drift matters. Anything going into a regulated or customer-audited process. And any situation where the consequence of a defect is expensive – because the agreement exists to settle that argument before it happens rather than during it.
The five things worth writing down
The specification, with tolerances. Numbers, and the test method for each. This is the part usually skipped, and it is the part everything else depends on.
What “acceptable” means. Not “good quality” – a defect classification. Critical, major, minor, with an example of each. Two people reading the same batch should reach the same verdict.
What happens to a rejected batch. Replacement, credit, or repair, and who pays freight. Say whether partial acceptance is allowed, because it usually happens and arguing about it each time is worse than agreeing a rule.
How claims are raised. Photographs, samples, timescale. A claim process that requires returning fifty units is a claim process nobody will use.
Change control. If the supplier changes resin, tool or process, you hear about it before the next delivery rather than after. This is the clause that prevents most long-run surprises, and it is the one most often left out.
How to get one agreed quickly
Write it yourself, one page, and send it with the enquiry rather than after the first order. Suppliers accept a short buyer-written document far more readily than they negotiate a long one, and sending it early makes it a condition of business rather than a retrospective imposition.
Avoid anything that reads as a legal instrument. A quality agreement is an operational document, and the moment it needs a lawyer it stops being useful.
What to do if a supplier refuses
Ask which clause. Usually it is the defect classification or the change-control commitment, and usually it can be narrowed to something acceptable. A supplier who refuses all of it is telling you how a problem would be handled.
Related: what to check when the delivery arrives, in goods-in: what to check when packaging arrives.
How to write a defect classification
Three classes, with an example of each. Critical: the item cannot be used at all – wrong dimension, wrong material, structural failure. Major: usable but degraded – visible defect, reduced performance, out-of-tolerance on a non-critical dimension. Minor: cosmetic, within a stated limit.
The examples matter more than the definitions. Two people reading the same batch should reach the same verdict, and they will only do that if the classes are anchored to something real.
And how to keep it short
One page, in plain language, with the specification attached by reference rather than reproduced. A long agreement gets signed without being read, and an unread agreement is worth nothing when you need to invoke it.
What we can do
We supply PP corrugated sheet and will sign a one-page agreement with tolerances, defect classes and change notice – we would rather agree it up front than argue about a batch later. Send us yours, or ask for ours.