Before using electronic component test reports to approve a purchase, check three things: whether the report covers the material being offered, whether the tests address your purchasing requirements, and whether the results support the stated conclusion. A prominent “PASS” is useful only within those boundaries.
For OEM and contract-manufacturing buyers, the practical decision is whether the evidence is sufficient to proceed, needs clarification, or leaves a requirement unmet. Review the report with engineering and quality before committing to material whose acceptance depends on it.
Establish what the report is meant to prove
Start with the unresolved concern. Are you assessing suspect-counterfeit indicators, selected electrical characteristics, physical condition, or suitability for a particular application? These questions need different evidence. A report may address one while leaving the others open.
The public scope of SAE AS6171A makes two important distinctions: testing cannot establish authenticity without the relevant unbroken chain of custody, and the standard is not intended to assess quality or reliability problems arising from production, mishandling, or improper storage. A counterfeit-screening result therefore needs a defined place within the wider acceptance decision.
Keep the report alongside the applicable purchasing specification and available source records. Write down which requirement each document supports. If manufacturer traceability is mandatory, a screening report does not resolve its absence.
Match the electronic component test report to the offer
Read the identification pages before the conclusions. Check the complete manufacturer part number, package, grade, submitted quantity, available lot and date codes, and the laboratory’s sample references. Reconcile these with the quotation and the proposed shipment.
Ask for clarification when the report lists a shortened part number or an unexplained marking difference. The laboratory may have recorded a top marking rather than the ordering code; the relationship needs to be documented. A matching device family name alone does not establish coverage of a particular suffix.
Check these connections explicitly:
- The report number, issue date, revision, laboratory identity, and complete set of pages and appendices.
- The supplier’s material or container reference and its link to the samples submitted.
- Photographs or records identifying the tested samples and relevant packaging.
- The correspondence between the tested material and the material reserved for your order.
If stock is substituted after testing, obtain a new coverage assessment. For the records needed after delivery, Cplus’s guide to component lot traceability through receiving and production explains how to preserve the material links.
Translate test names into evidence
A long list of methods can look comprehensive while leaving the key concern unanswered. The U.S. Department of Energy’s Suspect/Counterfeit Items Resource Handbook, section 6.6, describes the different purposes of electronics inspection methods. Use those distinctions to read the actual work performed.
| Method | Evidence it can provide | Question to ask when reviewing |
|---|---|---|
| Visual and dimensional inspection | Observations about markings, surfaces, leads, condition, and measured dimensions. | What reference was used, and were discrepancies recorded? |
| X-ray inspection | Images of internal construction and indications such as voids, cracks, or construction differences. | Which samples and views support the conclusion? |
| Electrical testing | Results for the functions or electrical characteristics actually exercised. | Which parameters, limits, and operating conditions were covered? |
| Decapsulation or other destructive physical analysis | Access to internal features for examination and comparison. | Which units were consumed, and what comparison evidence was available? |
Treat the conclusion as bounded by those methods. An internal image is not an electrical measurement, and a successful electrical check does not reconstruct the supply history. Where a reference device was used, request its identity and the basis for treating it as a suitable reference.
Read measured results against conditions and limits
For electrical results, identify the specification or datasheet revision, parameter, units, acceptance limits, applied conditions, and measured values where required by the agreed scope. A result without its conditions can be difficult to compare with the manufacturer’s specification.
For example, a voltage-regulator output measurement at one input voltage, load, and temperature answers a narrower question than checks across its specified operating conditions. This is a general illustration, not a test prescription for a particular regulator. Engineering should decide which characteristics matter for the intended purchase.
SAE’s public scope for AS6171/7 electrical test methods describes different testing levels that users can apply when defining a plan. A standards reference on a cover sheet should therefore lead to a scope review: ask which methods, revision, and agreed requirements were applied, including deviations or exclusions.
Have quality and engineering review unexplained failures, missing results, and readings near decision limits. Request the laboratory’s explanation of any retest and preserve the original result. Procurement should not reinterpret an adverse observation as acceptable because the overall summary says “PASS.”
Separate sample coverage from the lot decision
Look for a count against every method. The number submitted, visually inspected, electrically tested, and destructively examined may differ. “All samples passed” does not tell you how many units underwent each check.
NIST’s explanation of acceptance sampling describes selecting a random sample to support a lot-disposition decision. It also distinguishes that decision from estimating the quality of the lot. Zero failures in a sample should not be reported internally as proof that every untested unit is defect-free.
Ask how samples were selected and which identified population they represent. If the offer combines different source groups or lots, have quality assess their representation separately. There is no universally appropriate sample count for every component purchase; the plan must fit the applicable requirements and risk.
A worked review: what does “500 pieces tested” mean?
Hypothetical example: A supplier offers 500 voltage regulators and describes them as tested. The report shows visual inspection of 500 units, X-ray inspection of 20, and an output-voltage check on those same 20 at one room-temperature condition. Every listed result passes.
The buyer should record that evidence accurately: 500 received visual inspection; 20 received the stated additional checks. The report does not document electrical screening of all 500 or verification of every datasheet characteristic.
If the purchasing requirement calls for every unit to receive a defined electrical screen, this report leaves that requirement unmet. If an approved plan permits sampling, quality must still confirm the sample selection, scope, and acceptance rules. The same report can support one agreed requirement and be insufficient for another.
The next action is a precise clarification request: identify the missing coverage and ask whether the supplier can provide it, with the additional cost, sample consumption, and schedule stated. Avoid ordering a vague “full test” whose meaning remains unsettled.
Resolve report discrepancies before shipment approval
If page references, sample photographs, quantities, or revisions conflict, request clarification through the supplier and the issuing laboratory. Confirm the issuer through an independently verified contact route when authenticity of the document is in doubt. A formatting inconsistency warrants investigation; it does not by itself establish fraud.
Retain the issued report and any formal correction together. Make the final decision visible: accepted against the agreed requirements, awaiting specified evidence, or not acceptable. Identify who approved that disposition and which material it covers.
Make the evidence part of the sourcing enquiry
Cplus lists optical microscopy, X-ray analysis, electrical comparison, and other checks on its counterfeit-prevention page. Confirm the specific scope and reporting available for your enquiry rather than assuming every listed method accompanies every order.
Use Cplus’s Submit Requirement form to provide part numbers and quantities; the page also offers a shortage-list upload. Include the manufacturer, exact ordering code, required date, source-document requirements, and the checks your quality team needs. Attach a controlled requirements sheet when the test scope needs more detail.
Ask the quotation to identify included methods, sample quantities, report deliverables, exclusions, and the approval point before shipment. That gives purchasing a concrete basis for comparing the offer and gives quality evidence it can actually use.
