Suppliers & quality

When your China supplier's quality keeps slipping

When a China supplier's quality keeps slipping, record defects per shipment to find the pattern, turn the approved sample into a signed golden sample and specification, inspect before the balance is paid, and ask for a written corrective action with a root cause. If two orders after that still fail, qualify a second supplier. Cambridge China Bridge does this for UK buyers.

Written by Bono Xu, Founder, Cambridge China Bridge · 4 min read · Updated 2026-09-26

When a China supplier's quality keeps slipping: find the cause, tighten the standard, inspect with leverage, demand corrective action, add a second supplier.

A worker in a hi-vis vest and hard hat inspecting machinery in a plant

Why quality drifts after the first orders

Quality often starts well and slides. The factory buys cheaper material after the first price negotiation, a busy season sends part of the order to a subcontractor, the skilled worker who made your early batches leaves, or a detail that was never written down is done the easy way. None of it is visible from the UK until customers complain about fabric pilling, zips breaking, fill going flat or finishes marking.

The fix starts with evidence rather than a complaint. For each shipment, record the defects found, their share of the order, the batch or production date, and any returns data. After two or three shipments the pattern usually shows whether the problem is materials, workmanship, packing or a gap in the specification.

Tighten the standard

Most drift happens in the gaps between what was agreed and what was written. Rebuild the standard: a signed and sealed golden sample held at the factory and by you, a specification with measurable tolerances for dimensions, material weight, fill, stitching and finish, named materials or approved material suppliers, and packing requirements. Making bulk production match the sample sets this out step by step.

Send the revised specification as part of the next purchase order, so it is a contractual document rather than a request, and ask for a pre-production sample from bulk materials before the run starts.

Inspect with leverage and ask for corrective action

Book inspections yourself, during production and before shipment, against the golden sample and the acceptance limits in the order, and keep the balance unpaid until the report is passed. How to choose a QC inspection company covers who to use.

When a lot fails, ask the factory for a written corrective action: what went wrong, the root cause, what will change on the line and how you will see that change in the next inspection. An 8D report is a common format. A supplier that answers with a discount but no cause is telling you the problem will come back.

When to add a second supplier

If two orders after the standard has been tightened still fail on the same point, or the supplier will not give a root cause, start qualifying a second factory rather than waiting for a third failure. Give candidates the same golden sample and specification, run a pilot order, and compare defect rates and landed cost on real shipments. Qualifying a second supplier in China explains the approval gates.

A second supplier also changes the conversation with the first: a factory that knows it can lose part of the volume usually takes corrective action more seriously.

How we help

Cambridge China Bridge works with UK buyers whose current supplier has slipped: we inspect the existing supplier against the approved standard, and qualify an alternative factory against the same standard in parallel. See our second-supplier service. If you would rather keep the factory, see how we manage your existing supplier.

Frequently asked questions

Why does quality get worse after the first orders from China?

Cheaper materials after price pressure, subcontracting in busy seasons, staff turnover, and details that were never written into the specification.

How do I get a Chinese supplier to fix quality problems?

Tighten the written standard, inspect before paying the balance, and ask for a written corrective action with a root cause for each failure.

What is an 8D report?

A structured corrective action format that records the problem, its root cause, the fix and how the fix is verified.

When should I switch or add a supplier?

When two orders after tightening the standard still fail on the same point, or the supplier will not give a root cause.

Sources

  1. Intertek — Production inspection stages and reports

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