Factory Audit vs Product Test Report: What Each Document Actually Proves

# Factory Audit vs Product Test Report: What Each Document Actually Proves

Quick answer. A factory audit describes a factory on the day it was visited — its identity, site, process control and the records the auditor asked to see. A product test report describes identified samples of one model, tested by one method, on one date. A management-system certificate describes a documented process. None of the three substitutes for another, and a tender that asks for "certification" without naming which document it wants usually receives the most flattering one in the pile.

Why the wrong PDF keeps arriving

A public buyer opens a forty-page submission and finds a business licence, an ISO 9001 certificate issued to a company that is not the offerer, a salt spray report for a different model, and an audit summary with no date. Somewhere in that stack is the evidence needed to award a contract; the trouble is that the submission was assembled to look complete rather than to answer specific questions.

Documents about outdoor furniture differ along three axes: what is examined (factory, system or goods), who issues it, and how long the claim stays true. Separate those three and most submissions become readable in ten minutes.

Six documents, six different claims

The pattern is simple. Rows one, five and six describe a factory. Row two describes a system. Rows three and four describe goods. A supplier who answers a product question with a factory document has either misread the question or is managing the answer.

The test report: seven lines that decide whether it applies

Most arguments about test reports are about applicability, not results — and applicability is decided by seven lines on the document.

1. The standard and its edition. "Tested to EN 1728" without an edition is not a specification; methods are revised on their own timetable.
2. What kind of document the standard is. EN 1728:2012 is a test method for seating strength and durability; EN 581-2:2015 is a requirements standard for outdoor seating that calls up mechanical test methods. A method tells you how a load was applied; a requirements standard tells you whether the result passes.
3. Sample identification. Model code, dimensions, frame material, finish, and whether the specimen was a prototype or a production unit. A prototype that passed is a design milestone, not a production control.
4. The laboratory and its accreditation scope. Laboratories are accredited to ISO/IEC 17025:2017 per method, not in general; a report on a method outside that scope carries the letterhead without the assurance.
5. The judgement criteria. If the report lists results but no pass or fail, it is a measurement, not an assessment; ask which clause of the requirements standard was applied, and by whom.
6. Specimen count and the worst case. One specimen of the shortest model is weak evidence for a bench family that varies in length, slat material and fixings.
7. Date and change history. A report belongs to a design at a point in time; if the frame section, slat material or welding process changed afterwards, it describes something the factory no longer builds.

The defensible line names the standard, names the document and limits the claim: "Tested to EN 1728 per factory test report; certification status varies by factory." It is short because it refuses to say three things it cannot support — that every unit is tested, that the test is a certification, and that the result transfers to another model. For the seating-specific version of that distinction, our EN 1728 vs EN 581 comparison walks through which document applies to which product.

What an audit report can and cannot carry

An audit is a photograph, not a live feed: conditions on a date, against criteria, with evidence the auditor chose to sample. Four elements decide whether it is worth anything.

• Date and duration. A one-day visit to a factory running three shifts samples a fraction of the week; the report should say so.
• Auditor identity and competence. Who attended, on whose behalf, with what qualification. An unnamed "third-party audit" is a claim about an unnamed party.
• Scope and criteria. Which lines, which processes, which checklist. An audit of an assembly hall says nothing about the casting shop across the road.
• Objective evidence and nonconformities. What was inspected, which records were read, how findings were graded and when they close. Zero findings after a one-day visit usually means a narrow scope.

Between two audits a factory can move a coating line, change the subcontractor that casts its legs, or add a shift. That is ordinary industrial life, which is why audits repeat on a cycle and each shipment gets its own inspection: sampling per ISO 2859-1:1999 against agreed acceptance quality limits examines the actual container load, which neither an audit nor a test report sees.

Three checks that take ten minutes

Most failed submissions fail on identity rather than quality, and identity is cheap to check.

1. One name, one address. The legal name on the licence, on the proforma invoice, on the payment instruction and on the test report should be the same entity, or the relationship explained in one line. A report in the name of a trading company for a product made by a factory you have never heard of is a document about a stranger.
2. Scope wording. A management-system certificate names a scope and a site. "Manufacture of metal furniture" at one address does not cover a finishing plant in another city. Read the sentence, not the logo.
3. Look up the number at the issuer. Registry lookups belong on the issuing body's register, not the supplier's website. A scanned PDF proves a PDF exists; a live register entry proves the document was issued, and often whether it is still valid.

None of the three tells you whether a bench survives ten years in a coastal park. They tell you whether the paperwork describes the company you are about to pay.

Inspection documents for steel and aluminium: reading EN 10204 types

When the question is the material rather than the product, the relevant family is EN 10204, which defines four inspection document types for metallic products. The type number is the whole argument, and it is routinely omitted from purchase orders.

Furniture orders often ask for a "mill certificate" without naming a type, which is where the disagreement starts six weeks later. Where the tender needs chemistry and mechanical values traceable to the delivered lot — tube grade and wall thickness, casting alloy for a leg — type 3.1 is the usual request; 3.2 adds the independent second signature public projects normally specify. Confirm the current edition before writing a type number into a contract.

Coating evidence sits in yet another report

A structural test report says nothing about corrosion, and a corrosion report says nothing about strength — different failure modes, different laboratories.

Salt spray exposure to ISO 9227:2022 places a coated specimen in a standardised chloride fog for a stated number of hours, then evaluates the damage. The standard defines the method, not an acceptance threshold — pass criteria must come from the specification, which is why a report quoting hours without criteria is unreadable in procurement. Hours also do not convert into years of service: a 480-hour result compares coating systems, it does not warrant ten years outdoors. Our ISO 9227 salt spray guide covers how those hours are produced and where they get over-read.

The same limiting sentence applies here: "Tested to ISO 9227 per factory test report; certification status varies by factory."

Where a directory's verification stops

Verification of a factory is not assessment of a product, and a directory that blurs the two teaches buyers to trust the wrong document. The verified factory directory lists manufacturers after a pre-listing check covering business licence verification, production-site check and export compliance review — rows one and five of the table above, carried out once before listing, with the check date recorded on each profile. It is not product certification: test reports are available on request per factory, so a submission still has to be read the way this article describes.

What the profiles do supply is starting evidence on the material question: a factory's production profile shows what it actually works in — cast aluminium at the Foshan cast aluminium works, zinc-coated steel and stainless at the Zhangjiagang steel and urban furniture works. When a test report is under discussion for a cast aluminium frame bench with teak slats, the report that matters names that frame section and that slat material; likewise for a stainless and wood slat bench, where the stainless grade is the variable to pin down, and for a perforated steel park bin, where steel grade and coating are two separate documents.

Tender clauses that remove the ambiguity

Three lines in a specification prevent most of the confusion above. Name the document rather than the outcome: "a product test report to EN 1728:2012 and EN 581-2:2015 from a laboratory accredited to ISO/IEC 17025:2017 for those methods" is checkable, "certified to European standards" is not. State which variant was tested and require the worst case, so any gap between tested and offered must be declared. And say who pays for testing, third-party inspection and re-testing after a design change; naming the owner is cheaper than discovering it in a dispute.

For the full document set a municipal bench procurement should carry, see our municipal park bench tender checklist. Before any of it is tested, the company itself has to be real: the ten-step factory verification sequence covers the identity checks that precede a deposit, and the five signals of a trading company posing as a factory explain why so many reports arrive in the wrong company's name.

FAQ

Q1 — Is a factory audit the same as an ISO 9001 audit?

No. An ISO 9001 audit assesses a management system against ISO 9001:2015 for a defined scope and site, performed by a body accredited to ISO/IEC 17021-1:2015. A buyer's factory audit assesses whether that factory can make your product to your specification. A supplier can hold a valid management-system certificate and still fail a product-specific audit; the reverse also happens.

Q2 — Do product test reports expire?

There is no formal expiry date, which is exactly why the date matters. A report is evidence about identified samples of a defined design at a point in time. Re-test when the frame section, material, finish, fixing method or process changes, when the edition is revised, or when nobody at the factory can still confirm the design is unchanged.

Q3 — The factory sent a certificate instead of a test report. Which do I need?

They answer different questions. If your concern is durability under load, you need a product test report to the relevant method and requirements standard. If it is whether the factory has a controlled process, a management-system certificate is closer — provided its scope and site match the factory you are buying from. Neither assesses a container of benches.

Q4 — Should a furniture tender ask for EN 10204 3.1 or 2.2?

Ask for 3.1 where material values must be traceable to the delivered lot — structural tube, plate, castings. Accept 2.2 only where the grade is commodity-standard and lot-level traceability has no design consequence. If the clause matters, write the type number and the properties required, not the phrase "mill certificate".

Q5 — What if the supplier will not share an audit report?

Refusing one document is common: audit reports often contain customer names and process detail that factories guard. Refusing every document type while also failing the name-and-address check is a different signal. Then shift the weight to what you can verify independently — the business licence, a site visit or video walk-through of the specific line, inspection documents on the lot, and pre-shipment inspection of the load.

References

• EN 1728:2012 — Furniture — Seating — Determination of strength and durability (test method)
• EN 581-2:2015 — Outdoor furniture — Seating and tables for camping, domestic and contract use — Part 2: Mechanical safety requirements and test methods for seating
• ISO 9227:2022 — Corrosion tests in artificial atmospheres — Salt spray tests
• ISO 9001:2015 — Quality management systems — Requirements
• ISO/IEC 17021-1:2015 — Conformity assessment — Requirements for bodies providing audit and certification of management systems — Part 1: Requirements
• ISO/IEC 17025:2017 — General requirements for the competence of testing and calibration laboratories
• EN 10204:2004 — Metallic products — Types of inspection documents (types 2.1, 2.2, 3.1, 3.2)
• ISO 2859-1:1999 — Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
• Confirm current editions in the official ISO or CEN catalogue before drafting specifications.

Last updated: 2026-10-23