How to Read a Footwear Test Report for Custom PU Slides

Who this article is for

This guide is for brand owners, importers, purchasing teams, quality managers, and product developers who receive chemical, physical, mechanical, or performance reports for custom PU slide sandals. It is not a substitute for technical or regulatory review, and it does not determine which test or limit applies in a destination market.

Main sections

First identify the decision the report is meant to support

Before reading the numbers, write the purchasing question in one sentence. Examples include:

• Does this exact sample meet the agreed restricted-substance limit?
• Does the outsole specimen meet the project’s abrasion requirement under the stated method?
• Does the finished sandal meet an agreed attachment-strength criterion?
• Does the submitted material behave consistently with the approved reference?

If the report was ordered without a clear decision question, the result may be technically valid yet commercially unhelpful. A report cannot fill in a missing specification after testing.

Check 1: Report identity and status

Locate the report number, issue date, page count, laboratory name and address, customer name, authorised signatory, and any revision or replacement statement.

Confirm that every page belongs to the same report and that the document is final. Draft, preliminary, amended, and superseded reports should not be treated as equivalent. If a report was revised, ask what changed and whether the earlier version was withdrawn.

Electronic verification, a laboratory portal, QR code, digital signature, or direct confirmation can help authenticate a document. If there is doubt, contact the issuing laboratory or its accreditation body using independently obtained contact details.

Check 2: Sample identity

The report should describe what the laboratory received. Compare the report with the sample-submission form, purchase specification, and retained sample.

Look for:

• style or model number;
• sample code and specification revision;
• colour, size, material, and component;
• number of specimens or pairs;
• photographs or identifying marks;
• date received and date tested;
• condition of the sample on receipt;
• whether the sample was selected by the buyer, supplier, inspector, or laboratory.

A report for black strap material does not automatically cover a different colour, outsole formulation, finished sandal, later batch, or revised supplier. State the coverage rather than assuming it.

Check 3: Test method and edition

Read the full method reference, year or edition, and test title. Similar method names can use different specimen preparation, equipment, loading, conditioning, calculation, or reporting rules.

Also look for:

• laboratory in-house methods;
• client-specified methods;
• deviations from a standard method;
• modifications required by product geometry;
• excluded steps or unavailable specimen dimensions;
• subcontracted activities.

If the report says based on a standard, ask how it differs from performing the standard as written. A justified modified method can still provide useful data, but its scope and limitations must be visible.

Check 4: Sampling and conditioning

The report may show a precise result while leaving the sample plan unclear. Ask how many specimens were tested, where they were taken, whether they came from one pair or several pairs, and whether the laboratory sampled the goods or only tested items submitted by someone else.

Conditioning can affect footwear materials. Check temperature, humidity, conditioning time, pre-treatment, aging, wet or dry state, recovery interval, and any other method-specific condition.

For batch decisions, distinguish laboratory testing from lot sampling. A result for submitted samples does not prove that the laboratory selected a representative production sample unless that sampling activity is documented.

Check 5: Results, units, and calculations

Read individual results where available, not only the average. Verify units, decimal places, detection or quantification limits for chemical results, calculation formulas where stated, and any less-than or greater-than symbol.

Ask:

• Is the reported value the raw result, average, minimum, maximum, or calculated index?
• Were any specimens excluded?
• Is the result below the method’s reporting limit or simply recorded as zero?
• Do photos show the failure mode?
• Are left/right, colour, size, or component results separated?
• Does the conclusion match the displayed data?

Do not convert units or round borderline results without recording the effect on the decision.

Check 6: Requirement and decision rule

The result and the requirement are different fields. A test report may provide measured values without deciding conformity. If it states pass, fail, compliant, or non-compliant, identify the specification or limit used.

ILAC G8:09/2019 provides guidance on decision rules and statements of conformity in relation to ISO/IEC 17025:2017. ILAC G17:01/2021 addresses measurement uncertainty in testing. [2][3]

For the buyer, the practical questions are:

• What exact limit or tolerance was applied?
• Who supplied that requirement?
• Does it apply to this product, market, user group, and method edition?
• Was measurement uncertainty relevant to the conformity decision?
• What decision rule was used for a borderline result?
• Was the rule agreed before testing?

The laboratory should explain the reported decision within its competence. Legal applicability should be reviewed by the responsible market specialist.

Check 7: Accreditation claim and scope

Do not stop at an accreditation logo. Find the accreditation body, laboratory certificate number, validity status, location, and published scope.

Then check whether the scope covers:

• testing rather than a different accreditation activity;
• the relevant product or material field;
• the exact method or a properly described flexible scope;
• the laboratory location that issued the report;
• any activity marked as outside the accredited scope.

ISO/IEC 17025 accreditation is about demonstrated competence for stated activities, not a blanket approval of every service a laboratory sells. ILAC G18:01/2024 describes scope of accreditation as a core element of the accreditation process. [4]

As of 1 January 2026, Global Accreditation Cooperation Incorporated took over the international roles previously performed by ILAC and IAF and launched its MRA. Transition arrangements can mean that ILAC or IAF marks and historical references still appear on valid documents. Check current recognition with the relevant accreditation body or Global ACI resources. [5]

Separate the report from the buyer’s release decision

A passing report can still be insufficient for order release if:

• the sample identity does not match the approved product;
• a required colour, size, component, or batch is missing;
• the wrong method or limit was used;
• an out-of-scope activity is important to the decision;
• the result has an unexplained deviation;
• the specification changed after the sample was tested;
• packaging, labelling, workmanship, fit, or other project requirements remain open.

Create a short buyer review record rather than forwarding the PDF with no conclusion.

Use a one-page report extraction sheet

For every important report, extract:

1. report number and issue status;
2. sample identity and source;
3. method and edition;
4. laboratory and accreditation scope status;
5. specimens and conditioning;
6. result and units;
7. requirement and source;
8. decision rule or uncertainty note;
9. deviations, limitations, or excluded activities;
10. buyer decision, reviewer, and date.

This summary is not a replacement for the report. It makes gaps visible and gives the purchasing file a repeatable review format.

Red flags that require clarification

• The report photo does not match the sample description.
• The product code is a supplier’s internal name with no link to the buyer’s specification.
• Only one page is provided and the footer shows more pages.
• The method edition is missing.
• Pass is stated but the limit source is unclear.
• The accreditation symbol is used without a certificate number or verifiable scope.
• The laboratory name on the report differs from the accredited site.
• Results are copied into a supplier spreadsheet rather than supplied in the original report.
• A later material or construction change occurred after testing.

FAQ

Does an ISO/IEC 17025 logo mean every test is accredited?

No. Verify the laboratory’s current scope, method, field, and location. Reports may include both accredited and non-accredited activities if these are clearly identified.

Does pass mean the product is legally compliant everywhere?

No. Pass refers to the requirement and decision rule used in the report. Market applicability, product scope, and other obligations require separate review.

Can a supplier’s old report cover a new order?

Only if the buyer can justify that the tested sample, materials, suppliers, process, colours, specification, and applicable requirements still cover the new order. If not, define what must be retested.

Why do some reports contain no pass or fail statement?

The laboratory may have been asked to report measurements only, or no agreed requirement and decision rule may have been supplied. The buyer can compare the result with an approved specification using qualified review.

How can a buyer check whether a report is genuine?

Use the issuing laboratory’s official verification route and, when necessary, contact the relevant accreditation body. Do not rely only on contact details printed in a suspicious document.

Sources

[1] ISO/IEC 17025:2017. [2] ILAC G8:09/2019 on decision rules and conformity statements. [3] ILAC G17:01/2021 on measurement uncertainty in testing. [4] ILAC G18:01/2024 on scopes of accreditation. [5] Global Accreditation Cooperation Incorporated transition information. Full links and scope notes are in sources.txt.

Soft CTA

Henghao Slide Sandals Factory states that it reviews custom PU slide project requirements with overseas buyers. When discussing a report, share the exact style, material or component, destination market, test request, specification revision, and decision question through the Buyer Help Center or Contact page. Test selection, report interpretation, compliance, and factory capability must be confirmed by the appropriate parties for the actual project.