Quality
One answers whether this factory can make your product. The other answers whether this batch is the one you agreed to buy. Buyers book the second and expect the first.
Contents
An audit is about capability. It asks whether the entity exists, whether the premises are what they claim, whether the process is controlled and whether the records support the claims made in the catalogue. It happens before you commit, and it describes a factory rather than a delivery.
An inspection is about conformity. It takes a sample from a finished lot and measures it against a specification. It happens before the balance is paid, and it describes a batch rather than a business.
Buyers confuse them because both are performed by a third party with a clipboard. The consequence of the confusion is a passed inspection read as reassurance about next year, when all it established was that one lot was acceptable on one day.
A standard factory audit covers four blocks, and the fourth is where most findings land.
Social compliance, environmental permits and chemical management are separate scopes, sometimes covered in the same visit and often priced separately. If your customer or your market requires them, say so when booking, not when the report arrives.
An inspection is a sampling exercise under a defined standard, and the standard is usually ISO 2859-1 with an acceptable quality level agreed in advance.
The inspector draws a sample determined by the lot size and the inspection level, then checks the sample against the specification: dimensions, function, appearance, packaging, marks, and the count. Defects are classified as critical, major or minor, and the lot passes or fails on the count against the acceptance number for each class.
Three things follow from that design. The result is statistical, not absolute: a passed lot can contain defects, because sampling acceptance is built on a defined risk. The result is limited to what was checked: if the specification does not mention the coating thickness, nobody measures it. And the result is a snapshot: it says nothing about the next production run.
The inspector also confirms quantity, carton marks and packing against the order, and photographs everything. That part is often more useful than the defect count, because it catches the shipment that is correct but labelled for the wrong market.
What the inspection does not do is establish that the factory can repeat the result. The sample is drawn from one lot, the lot came off one line, and the line may have been running your order alongside three others. That is why a passed report is a statement about a delivery and never about a capability.
The audit belongs before the deposit, and ideally before the quotation is accepted. It costs a day and it answers the question that the licence and the public record cannot: whether there is a functioning factory behind the sales office.
The inspection belongs when production is finished and packed, and before the balance is released. Booking it earlier catches problems too late to fix cheaply; booking it after packing is the last moment when a rework is still possible without unpacking a container.
There is a third, underused option: a during-production visit, early in the run. It costs less than a failed inspection and catches a systematic error, the wrong material or the wrong label, while there is still time to correct the whole batch rather than negotiate a discount on it.
Two numbers decide an inspection report and neither is the headline verdict.
The first is the sample size and the acceptance number. A report that says passed without stating the sampling plan is an opinion. The second is the defect classification: what was counted as minor, and whether anything found should have been graded higher.
Then read the photographs and the remarks. A report can pass and still describe a factory packing cartons on a wet floor, or a label printed in the wrong language, or a carton weight that does not match the packing list. Those remarks are where the freight and the customs problems are visible before they happen.
An audit report reads differently. Look for the gap between claimed and observed capacity, the age of the equipment against the product, and whether the records shown were produced for the visit. An auditor who writes that documents were available but not in use has told you everything.
Four things fall between the two reports, and they are the four that cause the expensive failures.
Consistency over time: whether the fifth container matches the first. Financial stability: whether the factory can buy material before your deposit is spent. Design integrity: whether the product is what you specified rather than a competent version of something similar. And honesty about capacity: whether your order is being made in the building you audited or subcontracted to a workshop nobody has seen.
The last one is worth a specific question. Ask, in writing, whether any part of the order will be subcontracted, and record the answer. A factory that subcontracts without telling you has moved your quality control to a site with no audit and no inspection history.
None of these gaps is closed by a better report. They are closed by a second order, a second inspection and, eventually, by the record of what the factory did when something went wrong on the first one.
Third-party inspection and audit firms price per man-day plus travel, and the variables are scope rather than size of order.
An inspection is usually one inspector for one day on site. An audit is one auditor for one day for a basic scope, and two or more days where social compliance, environmental or chemical modules are added. Travel and subsistence are billed on top, and a factory three hours from the nearest city costs more than one in a industrial park near Shenzhen or Ningbo.
What raises the price fastest is notice. A booking made a week ahead is routine; one made for tomorrow is a premium service. What lowers it is bundling: an audit and an inspection at the same factory in the same week, or several lots inspected on one trip.
Skipping is a decision about exposure, and it can be a rational one.
An audit can be skipped where you have bought from the factory for years, or where the order is small enough that a failed delivery is survivable and the relationship is the security. It can also be deferred where a third-party certificate, verifiable at the issuing body, already covers the management system, though a certificate says nothing about capacity for your order.
An inspection is harder to skip sensibly. It is the last control before the money leaves, it costs a fraction of a container, and the alternative is discovering the defect at destination where the remedy is a claim rather than a rework. Where an order is too small to inspect, the honest substitute is a smaller order.
Q What is the difference between an audit and an inspection?
An audit assesses the factory: identity, premises, capacity, process control and records. An inspection assesses a finished lot against a specification by sampling. The first is about capability, the second about conformity, and a pass in one says nothing about the other.
Q How long does a factory audit take?
A basic audit is normally one auditor for one day on site. Adding social compliance, environmental or chemical modules extends it to two or three days, and the report usually follows within a week.
Q What does AQL 2.5 mean?
It is the acceptable quality level for major defects: the sampling plan is built so that lots at that defect rate are accepted most of the time. It is a defined risk, not a guarantee, and it is set in the purchase order rather than chosen by the inspector.
Q Can an inspection guarantee there are no defects?
No. Inspection is sampling under a statistical standard, so an accepted lot can still contain defects. It reduces risk and it creates a record; it does not eliminate the possibility.
Q Should I inspect every order?
Every first order and every order from a new factory, at minimum. On repeat business with a stable supplier, an inspection every second or third shipment plus a during-production visit is a common compromise.
Q Who pays for the inspection?
Usually the buyer, and it is worth pricing into the landed cost from the start. Some suppliers accept the cost when a failure triggers re-inspection, which is a clause worth writing into the purchase order.
Related pages
Tell us the factory city and the ready date. We will tell you which window is realistic for an inspection before the balance, and what the report needs to say for the shipping documents to match.
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