To decide which supplier sample to approve, compare every sample against the same written specification and use the same inspection method. Record measurable differences, then test performance claims that photos and basic measurements cannot confirm.
Prepare one comparison brief
Before reviewing samples, turn the product requirements into a checklist. Include the approved drawing or reference, dimensions and tolerances, material requirements, color references, workmanship criteria, label artwork, packaging details, and any function or performance requirements. Mark each item as pass, fail, or unresolved, and define acceptable limits before comparing suppliers.
Send the same brief to every supplier and ask each to identify the sample’s model or version and disclose any deviations. Assign each sample a neutral ID, such as Sample A or Sample B. Keep the supplier name, receipt date, quoted specification, and sample condition in your records so the comparison remains traceable.
For a consistent supplier request, see this China sourcing RFQ template. If you are assessing private-label options, the supplier shortlist guide can help structure the wider supplier comparison.
Compare the same requirements
Use one checklist for every sample. Apply the same measuring tools, inspection conditions, and acceptance criteria; do not change the standard after seeing which supplier made the sample.
| Requirement | What to record | Verification step |
|---|---|---|
| Dimensions and fit | Required measurements, tolerances, and mating parts | Measure the same points on each sample using the agreed method; record actual results and any fit issues. |
| Materials and finish | Specified material, color reference, coating, or surface finish | Compare against the written specification and reference; request supporting material information if the sample alone cannot establish composition. |
| Workmanship | Seams, edges, joints, fasteners, moving parts, and visible defects | Inspect the same areas under consistent lighting and take close-up photos of any difference. |
| Labels and markings | Approved artwork, wording, placement, and required marks | Compare the sample with the approved file and record missing, altered, or misplaced details. |
| Packaging | Components, protection, inserts, and carton or product markings | Open and inspect each package; photograph its contents and compare them with the agreed packing specification. |
| Function | Required operation, compatibility, or other performance criteria | Follow a written test procedure; record the setup and result, and arrange suitable technical testing when needed. |
Keep the comparison tied to the specification, not to general impressions such as “better finish.” If appearance matters, define the reference and the feature to judge, then photograph the same area on each sample.
Record differences with evidence
For every finding, log the requirement, the observed result, the sample ID, and the evidence. Take an overall photo for identification and close-ups for specific issues; include a ruler or other scale where it helps show size. Record measurement units and the points measured. A short note such as “hole is offset” is less useful than the actual measurement, the agreed tolerance, and a photo showing the location.
Keep the original sample and its packaging identifiable while the review is open. If a supplier says a difference is intentional or can be corrected, record that response and ask for the proposed change in writing. Do not treat a promise to revise as evidence that a corrected sample now meets the brief.
For a structured receiving, photo, measurement, and comparison workflow, review Sample Consolidation & Photo Review. The service description covers sample receiving, photo review, measurement, and comparison.
Identify claims that need testing
A sample inspection can show visible construction and measured features, but it cannot establish every claim. Claims about durability, load, electrical behavior, compatibility, composition, or performance need an appropriate test method and evidence tied to the exact model and revision being considered.
Ask the supplier what procedure was used, which sample or model was tested, and whether a complete report is available. Check that the tested version matches the sample and proposed production specification. If the claim affects safety, use, or market access, define the applicable test requirements with a qualified technical provider and verify current regulatory requirements with the relevant authority. Do not treat a label, certificate image, or verbal assurance as a substitute for confirming scope and traceability.
Decide what happens next
Classify each requirement as pass, fail, or unresolved. Treat a failure on a critical requirement as a blocker, even if the sample scores well on other features. For an unresolved point, request the missing evidence, a technical test, or a revised sample. If a difference is acceptable, document the exact approved exception and update the specification before placing an order.
Approve a specific sample version, not a supplier in the abstract. Record its ID, revision, agreed deviations, and approval date, and ask the supplier to confirm that the production specification will match it. Sample approval does not replace checks on goods produced later; define production and shipment checks separately.
FAQ
Should I choose the sample with the best overall appearance?
Not by itself. Compare it against the requirements that matter to your product and customer. A polished appearance does not resolve a dimensional, material, functional, labeling, or packaging mismatch.
Can I approve a sample if one detail differs from the specification?
Only after you decide whether that difference is acceptable and record the approved exception in writing. If it affects a critical requirement or remains unclear, request a corrected sample or further evidence before approval.
Is a sample enough to verify a supplier’s performance claims?
Not necessarily. Identify the claim, the test method needed, and the version to be tested. Request evidence that matches the proposed model, and arrange appropriate testing when visual review or measurement cannot establish the result.
To set up a comparison, share the product link or drawing, required dimensions and tolerances, material and finish requirements, function and labeling criteria, packaging expectations, number of supplier samples, intended order quantity, destination, and any existing project decisions. Use discuss requirements to outline the project.