To read a power window switch test report, first match the report to the exact item and claim you are evaluating. Then locate the method, test conditions, acceptance criteria, results and stated scope. Record what the document actually establishes and what remains open before using it in a purchasing decision.
The companion report-reading worksheet gives distributors and purchasing teams a place to record those fields, page references and follow-up actions. This guide also walks through a real public vehicle-system report as a reading exercise. It is not a PIRANA switch test, and its results cannot be transferred to a PIRANA product.
Start with the question the report must answer
A buyer may ask whether a particular switch revision met an agreed operating, environmental or other product requirement. Write that question before reading a report summary. Name the supplier SKU, revision, required property, acceptance basis and intended application where known.
Then use this reading map:
| Check | Find in the document | If the information is absent or ambiguous |
|---|---|---|
| Report identity | Issuer, report number, issue/revision, dates and complete pages. | Request the complete current document and verify its source. |
| Tested subject | Exact item or system, model/revision, sample identity, quantity and selection where reported. | Hold the link to the offered product until the subject is identified. |
| Method | Method title or identifier, edition and stated deviations. | Ask which procedure was used and what any deviation changes. |
| Conditions | The loads, duty, environment, setup and other relevant conditions actually reported. | Request the missing condition before treating a result as applicable. |
| Acceptance basis | The requirement, criterion, unit and source used for the stated decision. | Do not invent a limit or call a number a pass. |
| Results | Observations, measurements, units and which sample or test they belong to. | Ask for the relevant result or complete data sheet. |
| Scope and limits | What the report says about the items tested, exclusions and any conclusions. | Separate supported findings from the broader claim being requested. |
An unfamiliar report number or supplier logo is a reason to verify the document through an appropriate channel. A report title, stamp or summary line cannot by itself establish that it belongs to the exact item in the quotation.
Match the sample to the offered switch
Record the offered brand, SKU and revision separately from the original vehicle reference. A report for a similar-looking switch, an earlier revision or an unspecified family may still be useful context, but its relationship to the offered item needs evidence. If the supplier says several models share a tested design, ask for the documented scope and any differences relevant to the claim.
For example, the PIRANA HQ-6901 catalogue record lists HQ-6901 with reference A9438200097. That catalogue declaration helps identify a candidate. It is not a test report, proof of a particular sample’s performance or confirmation of a buyer’s vehicle fitment. No HQ-6901 test result is presented in this guide.
The original equipment (OE) number, supplier SKU, report subject and vehicle requirement answer different questions. Use the OE-number identification guide when the original part or vehicle record is still unresolved.
Follow method, condition, criterion and result together
Do not detach a result from the method that produced it. A statement about operating cycles, electrical behavior, temperature or another property is meaningful only within the documented sample, procedure and conditions. Ask whether the report identifies what was measured, how it was measured, any relevant deviations, and the version of the method used.
Next, find the acceptance criterion and its source. A report may give measurements without a pass/fail statement, or it may describe a test as informational. If the criterion is absent, record the measured observation without inventing a threshold. If the reported criterion differs from the buyer’s agreed requirement, keep that difference visible rather than treating the document as equivalent.
For a numerical result close to a limit, ask whether measurement uncertainty and the applicable decision rule are relevant and documented. NIST defines a decision rule in terms of how measurement uncertainty is accounted for when stating conformity with a specified requirement. The applicable laboratory and agreement determine the rule; this guide does not prescribe a universal guard band or pass/fail formula.
Walk through a real public report
Open General Testing Laboratories report 118-GTL-20-005, hosted by NHTSA. The document is a historical US vehicle-system compliance test for a 2020 Audi A3 passenger car, dated January 21, 2020. It is useful for learning how to navigate a report because its cover, procedure summary and data sheets can be read together. It is not a standalone aftermarket switch test and does not establish a PIRANA product result, approval or vehicle application.
The locations below use PDF viewer page numbers, starting with the cover as page 1:
| Reading question | Where to look | Bounded observation | What remains outside the report’s use here |
|---|---|---|---|
| What was tested? | PDF page 1, cover | The named subject is a 2020 Audi A3 and its power-operated window, partition and roof panel systems. | An isolated PIRANA switch, a different vehicle or a different SKU. |
| Which method was reported? | PDF page 6, section 2.0 | The laboratory identifies NHTSA procedure TP-118-06, dated April 12, 2006, and its own procedure. | A universal component-test method for aftermarket switches. |
| What did the summary state? | PDF page 6, section 2.1 | The report says window operation showed no anomalies and that the test data indicated the stated requirements appeared satisfied. | A blanket pass for every switch, model, future production lot or vehicle. |
| Was every listed activity a conformity result? | PDF page 6, section 2.0, item I | Auto-reverse force testing is expressly marked for information purposes. | An isolated switch pass/fail result or a threshold for a PIRANA product. |
| Where is the supporting detail? | PDF pages 9–16, section 3; page 17, section 4 | Individual data sheets record the vehicle and observations; the equipment section lists instruments and calibration information. | Authenticity or suitability of an unrelated supplier report. |
The practical lesson is to preserve the subject, procedure, reported conclusion and purpose of each activity together. A buyer assessing a replacement switch would still need the exact product’s own relevant report and the applicable vehicle requirement. A vehicle-level result cannot be relabelled as a product-level result.
Separate a product report from a company certificate
A product test report and a quality-management certificate answer different questions. The IATF Rules 6th Edition Q&A, page 185, states that IATF 16949 certification concerns a quality management system; it is not product certification or confirmation of process capability. The document does not establish that PIRANA holds such certification.
If a certificate is relevant to your supplier review, check the named organization, site, scope and validity. For a product claim, ask separately for evidence on the exact item, revision and property. The supplier evaluation checklist covers that broader supplier decision, while the quality inspection guide covers a sample or incoming-lot inspection record.
Use the report-reading worksheet
The companion Excel file contains two sheets:
| Sheet | Use |
|---|---|
| Report review | Enter one report and one defined claim. The 15 prepared review rows capture report identity, item, method, conditions, criterion, results, scope and next action. |
| Worked example | Follow the public 2020 Audi vehicle-system report and its page references. It is context for reading, not evidence of a PIRANA switch test. |
In Report review, fill the report’s actual wording or a precise summary, its page or source, and the next action. Use Not provided, Recorded, Not applicable or Conflict to describe the record. A Recorded entry needs both evidence and a location; Not applicable needs a reason. The grey entry check shows the first detected input gap. It does not authenticate the report, interpret its test method, decide whether a result satisfies a buyer’s requirement or approve a product.
Keep the actual source document with the review. If a decisive item, method, criterion, condition or result is missing, record the question and responsible owner. For a PIRANA enquiry, identify the exact SKU/revision and the property or application you need to assess through the parts enquiry route. Obtain and review the applicable document before making a claim about the product.
References
- General Testing Laboratories — Report 118-GTL-20-005, January 21, 2020, hosted by NHTSA: 2020 Audi A3 vehicle-system reading example.
- National Institute of Standards and Technology — Decision Rule: definition used for the uncertainty discussion.
- International Automotive Task Force — Rules 6th Edition Q&A, July 2024, page 185: scope of management-system certification.
- PIRANA — HQ-6901 catalogue record: catalogue identity context only, not a test result.
