Direct answer
AQL sampling supports an agreed lot-acceptance decision; it neither automatically replaces per-channel optical tests nor guarantees a defect-free lot. Define inspection units, defect categories and test scope before selecting the sampling scheme and optical-data coverage. AQL or 100% tested alone does not identify which fibers or properties were checked.
Define one unit and one defect
A trunk can contain several connectors and many fibers. If the finished assembly is the inspection unit, specify what makes that unit nonconforming and how optical records map to its fiber IDs. Cable, connector and channel counts should not be mixed in one statistic.
For an original counting example, twenty nominal twelve-fiber assemblies contain 240 nominal fiber-path positions. Actual reading counts also depend on ports, directions, wavelengths and methods. This is not a sampling plan and assumes no independence between defects.
| Level | Possible inspection object | Also define |
|---|---|---|
| Lot | Agreed order or batch scope | Lot formation and separation |
| Assembly | One finished cord | Unit nonconformity rule |
| Connector | Named interface or endface | End and check performed |
| Fiber path | Drawing-identified channel | Mapping and measurement scope |
| Reading | One measurement result | Method, direction, wavelength |
Retain the risk meaning of AQL
The official ISO 2859-1 entry describes AQL-indexed lot-by-lot attribute sampling and identifies the third edition of January 2026. NIST's explanation distinguishes AQL, lot quality and producer/consumer risks; acceptance probability is not evidence of zero defects.
AQL 2.5 alone neither specifies a complete plan nor means a fixed 2.5% defective allowance in every lot. This guide selects no AQL, sample size or acceptance number and reproduces no protected tables. The responsible quality party should agree the scheme under the contract and applicable documents.
A new standard edition does not automatically rewrite an existing contract. Identify the agreed edition and evaluate any change before applying it to previous orders.
Specify properties as well as coverage
100% may mean every assembly received one check, without establishing that every channel was measured in every required direction and wavelength. Use an assembly/channel/property coverage matrix rather than a slogan.
Separate design qualification, process checks and delivery acceptance. Environmental qualification does not automatically become a routine test of every unit; dimensional sampling cannot cover unmeasured optical properties.
| Check | Agree | Record |
|---|---|---|
| Appearance/labels | Units, defect classes, scheme | Lot and sampled results |
| Dimensions/construction | Drawing revision and scope | Measurements and decisions |
| Continuity/mapping | Assemblies, ports, fiber IDs | Drawing-linked map |
| Optical measurement | Properties, method, coverage | Channel results and reference |
| Design validation | Applicable construction and changes | Relevant validation report |
Agree disposition with acceptance
Specify isolation, review, disposition and resubmission after nonconformities. Do not replace the original lot decision with an undocumented sorted result, or delete failed records to retain only a passing summary.
These are procurement-planning recommendations, not a claimed company-certified process. If the contract requires full channel data, a separate sampling agreement does not automatically remove that obligation.
Keep the data traceable to assemblies
A useful package identifies part, drawing revision, lot, inspection scope, method and original-result index. Retain sample-selection records for sampled checks and fiber-to-data mapping for per-channel results, making each conclusion's evidence clear.
No ARRANEX AQL scheme, inspection level or 100% test process is asserted here. Start an RFQ with construction drawings and required records, then agree verifiable checks and acceptance.
Procurement FAQ
- Does AQL mean the allowed defective percentage per lot? That simplification misses its role in an acceptance scheme.
- Does sampling replace all optical data? Use only the scope expressly agreed in the contract.
- Does 100% tested cover every fiber and property? Check assembly, channel, property and method coverage.
- Does a new edition automatically change old contracts? Have the responsible parties confirm edition and changes.
- What belongs in the RFQ? Drawing, lot definition, checks, defect definitions and required data package.
Related products and reading
- MPO harness configurations
- Test reference-cord configurations
- Acceptance raw data and reports
- Measurement uncertainty and decisions
Related pages support requirements review. Materials, service conditions, performance and delivery scope depend on mutually confirmed specifications.
Contact an engineer with drawings and validation requirements
Sources and review date
Reviewed on 2026-10-19. Source dates remain separate from the review date. Manufacturer examples explain terminology; procurement tables are editorial recommendations, not ARRANEX specifications or certifications.
Sources checked: 2026-10-19