Before relying on an AQL inspection pass, check which lot was sampled, which acceptance rules were applied, and which findings remain open. A supplier’s report can support product acceptance while a carton discrepancy still needs correction before dispatch. For an Amazon FBA buyer, the useful result is a report that explains both outcomes without treating one as proof of the other.
This guide covers supplier sampling and the origin handoff. Use it alongside the approved product specification and current shipment instructions; it does not prescribe Amazon’s SKU-specific preparation or receiving requirements.
Start with the lot behind the result
Sampling selects a subset of a population or product lot. ASQ’s sampling guidance explains its usefulness when collecting information on every item is impractical or too costly. Before reviewing defect totals, match the report to the SKU, purchase order, supplier, production run, quantity, and packaging configuration actually offered for inspection.
Acceptance sampling supports a decision about whether a lot is likely to be acceptable rather than an estimate of its exact quality. NIST makes this distinction explicitly. A pass therefore supports the agreed lot disposition; it does not prove that every uninspected unit conforms.
Require random selection across the defined lot. Supplier-selected display cartons offer different coverage from stock selected under the approved procedure. If cartons were inaccessible, the reviewer needs to know which stock the inspector could reach before deciding whether the report covers the intended order.
Read the decision rule, not just the AQL value
A lot acceptance sampling plan includes both a sampling scheme and decision rules. NIST describes these components together. As a purchasing recommendation, approve the method, sample size, selection procedure, inspected characteristics, counting basis, and category-specific acceptance and rejection numbers before inspection starts.
NIST describes AQL as a percent defective used as a baseline requirement for the producer’s product quality. Its definitions distinguish this quality level from the sample’s acceptance number. AQL 2.5 does not automatically permit exactly 2.5% defective units in any sample. Obtain the applicable plan and table or calculation.
The report should identify the specification revision and show actual counts beside the corresponding decision limits. This lets the buyer reproduce the reported disposition. If a required test used a different sample or method, keep its result identifiable rather than assuming the general inspection pass includes it.
Resolve classification before comparing counts
Use critical, major, and minor categories from the product specification approved by the buyer and supplier, rather than silently adopting an inspection provider’s defaults. Tie each category to an observable requirement. A missing accessory that prevents normal use and an appearance flaw need separate definitions; a cosmetic mark within the approved tolerance is not automatically a defect.
State whether the plan counts defective units, individual defect occurrences, or both. Hypothetically, one unit with two findings represents one affected unit and two occurrences. Those totals answer different questions. The report should connect findings to identifiable units, photographs or measurements, and the applicable category, then compare each category with its own rule.
Keep carton exceptions visible beside the product result
Define the packaging scope explicitly: accessories, inner protection, barcode readability, carton condition, shipping marks, quantities, dimensions, and gross weight. These checks need their own findings. Otherwise, a prominent product-quality pass can obscure an unresolved exception in the cartons that will actually travel.
UPS recommends a rigid box with attached flaps and keeping its contents within the box’s maximum weight limit. Its packaging guidance offers a concrete carrier example for the checklist. Apply it within the relevant UPS service scope; it does not establish universal ocean-freight or Amazon requirements.
Forest Leopard’s origin inspection and carton-reconciliation service describes reconciling cartons, inspecting the agreed scope, and correcting exceptions. For a scope discussion, supply the specification revision, proposed sampling instructions, carton list, and current label file. Its Amazon FBA receiving path separately describes delivery, receiving, discrepancy resolution, and inventory availability; an origin inspection report should not be treated as evidence that those later milestones occurred.
Distinguish a second sample from a fresh attempt
Under double sampling, an inconclusive first result triggers a second sample, and the final decision uses the combined defective count. NIST sets out this continuation procedure. The second stage belongs to the predefined plan. It is not permission to disregard a rejected first sample and keep drawing replacements until one passes.
For a rejection, first check lot identity, selection, classification, and decision limits against the approved instructions. Then apply the agreed disposition: rework, sorting, replacement, reinspection, or rejection. Specify supplier-caused reinspection costs and closure evidence in advance. A corrected lot needs an appropriate disposition under that procedure, rather than an unexplained replacement pass.
Work through a 20-unit discrepancy
Hypothetical example: A kitchen-organizer order contains 1,200 units packed as 60 cartons of 20 units. Assume its product sample meets the approved category limits. The inspector finds inadequate cushioning in one carton, while the packing list shows 59 cartons. That document accounts for 59 × 20 = 1,180 units, leaving a 20-unit discrepancy against the order.
The report cannot establish whether a carton is missing or the list is wrong. Recount the cargo, compare carton identifiers with the loading record, correct the cushioning, and reconcile the confirmed quantity. The person checking documents may identify the mismatch without authority to stop or release cargo. Submit the correction evidence to the party assigned movement authority in the booking or contract, and record that party’s instruction separately from product acceptance.
Questions that change the inspection decision
What if the supplier changes the lot after inspection?
Identify the added units or substituted cartons and ask the inspection provider whether the earlier selection still covers the offered lot. Obtain the required disposition before relying on the original report.
What if the report omits acceptance and rejection numbers?
Request the approved plan and a corrected report showing the applicable limits beside the findings. Do not reconstruct the limits from the AQL value alone or negotiate new limits after seeing the result.
What if a finding’s classification is disputed?
Compare the finding with the approved specification, tolerance, and supporting photographs or measurements. Refer an unresolved interpretation to the designated specification approver before recalculating the category total.