Accreditation & reports

ISO/IEC 17025 test report requirements

The test report is the only output of your work the customer actually sees — and the document an assessor reads most closely. This guide walks through the requirements of clause 7.8 item by item.

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In short

Under ISO/IEC 17025:2017 clause 7.8.2.1, every test report must contain at least: a title, the laboratory's name and address, the location where the work was performed, unique identification with a clearly marked end of the report, the customer's name and contact details, the method used, unambiguous identification of the item tested, the dates of receipt, testing and issue, a reference to the sampling plan and method where relevant, a statement that the results relate only to the items tested, the results with units, any deviations from the method, the person authorizing the report, and clear identification of results from external providers. Clause 7.8.3 adds the test conditions and — where relevant — a statement of conformity, the measurement uncertainty, and opinions and interpretations.

The mandatory items in clause 7.8.2.1

Clause 7.8.2.1 lists sixteen items (a to p) that every report must include unless the laboratory has a valid reason for leaving one out. The table summarizes them, each with the point where reports most often fall short in practice.

Mandatory itemWhat matters
a) TitleFor example “Test Report”. Sounds trivial, but it is surprisingly often missing from documents assembled from templates.
b) Laboratory name and addressThe address of the legal entity, not just a logo.
c) Location of the workImportant when testing took place at the customer's site, a remote location or in a mobile facility.
d) Unique identificationA unique report number on every page and a clear marker for the end — for example “page 3 of 12” and “end of report”.
e) CustomerThe customer's name and contact information.
f) MethodThe standard or in-house method including its edition, not just “as specified by customer”.
g) Item testedDescription, unambiguous identification (such as serial or part number) and, where necessary, its condition on receipt.
h) Date of receipt or samplingWhere this is critical to the validity and application of the results.
i) Date of testingThe period the work was actually performed, not the planned slot.
j) Date of issueThe date the report was released.
k) SamplingReference to the sampling plan and method where relevant to the validity or application of the results.
l) Scope of the resultsA statement that the results relate only to the items tested (or as received).
m) ResultsWith units of measurement, where appropriate.
n) DeviationsAdditions to, deviations from or exclusions from the method — the item assessors deliberately cross-check against the raw data.
o) AuthorizationIdentification of the person(s) authorizing the report.
p) External resultsClear identification of which results come from external providers.

In addition, clause 7.8.2.2 requires information supplied by the customer to be clearly identified — together with a disclaimer that the laboratory is not responsible for it where it can affect the validity of the results.

What a test report additionally needs (7.8.3)

For test reports — as opposed to calibration certificates — further information is required where it is needed to interpret the results:

  • Test conditions, for example environmental conditions such as temperature and humidity where they affect the result.
  • A statement of conformity with requirements or specifications, where relevant (details below).
  • The measurement uncertainty, in the same unit as the result or relative to it — when it is relevant to the validity or application of the results, when the customer asks for it, or when it affects conformity with a specification limit.
  • Opinions and interpretations, where appropriate.
  • Additional information required by specific methods, authorities, customers or groups of customers.

Where the laboratory performs the sampling itself, clause 7.8.3.2 adds the date of sampling, unique identification of the sample, its location, a reference to the sampling plan and method, relevant environmental conditions and the information needed to evaluate the measurement uncertainty of subsequent testing.

Statements of conformity and decision rules

“Pass” or “within limits” is a statement of conformity, and clause 7.8.6 sets its own requirements for it. The report must make clear:

  • which results the statement of conformity applies to,
  • which specifications, standards or parts thereof are met or not met,
  • which decision rule was applied — unless it is already inherent in the requested specification or standard.

The decision rule describes how measurement uncertainty is accounted for when a result lies close to a limit: for example whether a value just below the limit counts as a pass even though its uncertainty interval crosses the limit (simple acceptance), or whether a guard band is applied. Under clause 7.1.3 the rule must be agreed with the customer during contract review. ILAC-G8 describes the common approaches. A report with a “pass” stamp but no identifiable decision rule has been one of the most frequent assessment findings since the 2017 revision.

Amending an issued report (7.8.8)

An issued report is never silently overwritten. When it has to be changed, amended or re-issued:

  1. 1

    Identify the change clearly

    Changed information is clearly marked and, where appropriate, the reason for the change is included.

  2. 2

    Issue it as an amendment or a new report

    Changes after issue are made only as a further document or data transfer with a statement such as “Amendment to Test Report serial number …” — and must meet all requirements of the standard.

  3. 3

    Reference the original in a replacement report

    When a completely new report is issued, it gets its own unique identification and references the original it replaces.

  4. 4

    Keep the original

    The original version is retained as a record. Laboratories that keep reports as Word files on a shared drive and simply re-save them after a correction lose exactly this evidence.

Simplified reports for internal customers

Clause 7.8.1.3 allows simplified reporting when agreed with the customer — typical for in-house labs and development test departments whose customer sits in the same company. Simplified does not mean omitted, though: all information from 7.8.2 to 7.8.7 that is not in the report must be readily available in the laboratory. The mandatory items do not disappear; they move into the data behind the report — and that data has to be just as complete in an assessment.

Common assessment findings

  1. 1

    Page numbers without a total

    “Page 3” instead of “page 3 of 12” and no end-of-report marker — so there is no way to show the report is complete.

  2. 2

    Method without an edition

    The report names the standard but not its version. If the standard has changed since, it is no longer traceable what the test was performed against.

  3. 3

    Deviations in the lab notebook, not in the report

    A shortened test duration or a replaced test step is documented in the raw data but missing from the report. This is exactly what assessors compare.

  4. 4

    Equipment not traceable

    Neither the report nor the linked records show which instrument was used and whether it was validly calibrated at the time.

  5. 5

    Correction by overwriting

    A typo is fixed in the file and the report is re-sent with the same number. Formally there are now two different documents with the same identification.

Reports built from data, not from templates

Most findings don't happen because the lab doesn't know the requirements, but because the report is assembled by hand from data spread across different places: the item in one list, measurements in CSV files, instruments in the calibration spreadsheet, deviations in emails. Every manual copy step is an opportunity for a gap.

  • Mandatory items come from master data, not free text — so they can't go missing.
  • Every page carries the unique report ID.
  • The equipment used is listed with its calibration status next to each test step.
  • A correction creates a new version that references the superseded one and states the reason for the amendment; the previous one is kept as evidence.
  • Test method, measurement uncertainty, decision rule, test conditions and date of receipt come from recorded data — not from a template.
  • Approval is electronic, with name and date stamped into the PDF; an approved report can no longer be deleted and only then becomes visible to the customer.
  • Interim reports are labeled as such and can't be confused with the final report.
  • A completeness check before generation flags missing measurements or verdicts.

That is how TestLabIQ produces reports: as versioned PDF documents generated directly from the item under test, the test sequence, measurement data and equipment history — with the mandatory content of clause 7.8, the agreed decision rule applied in the evaluation itself, and electronic approval. The help page on reports describes the details; whether it fits your report format is quickest to answer in a demo.

Frequently asked questions about ISO/IEC 17025 test reports

Does measurement uncertainty always have to be in the test report?

No. Under 7.8.3.1 c) it belongs in the test report when it is relevant to the validity or application of the results, when the customer requests it, or when it affects conformity with a specification limit. The laboratory must still have evaluated it — clause 7.6 requires the evaluation regardless of whether it is reported.

Does a test report have to be signed?

The standard requires identification of the person authorizing the report, not a handwritten signature. Electronic authorization is acceptable as long as it is traceable who authorized the report and that it was not changed afterwards.

Can a test report be sent as a PDF by email?

Yes. The standard allows reports on paper or electronically. What matters is that the report cannot be changed unnoticed after issue and that the laboratory keeps the issued version itself.

What is the difference between a test report and a calibration certificate?

A test report documents the results of testing an item; its additional requirements are in 7.8.3. A calibration certificate documents the calibration of an instrument; it is subject to the additional requirements of 7.8.4, in particular stating the measurement uncertainty and metrological traceability, which are not optional there.

How long do test reports have to be retained?

ISO/IEC 17025 does not specify a fixed period. The laboratory defines the retention period for its technical records itself (clause 8.4), taking contractual and legal obligations into account. Five to ten years is common depending on the industry, often longer for product- or safety-related testing.

Test reports generated from your data

TestLabIQ generates versioned reports directly from the item under test, measurement data and equipment history — with a unique report ID on every page.

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This guide is editorial orientation, not legal or accreditation advice. The authoritative sources are the text of ISO/IEC 17025 in its current edition, relevant guidance documents such as ILAC-G8, and the interpretation of the responsible accreditation body.