Buyer Question
How should an importer document major defect limits before combining multiple SKUs in Canada?
Importers combining multiple knife SKUs in Canada need a clear record of major defect limits before shipment. This guide shows how to set AQL per SKU, document acceptance decisions, and confirm Canada-specific requirements.
Set a major defect AQL for each SKU before any combined lot is accepted. Use ISO 2859-1 sampling tables to fix the acceptance number at your chosen AQL, and record the defect definition, sample size, and accept/reject decision separately per SKU. Then, only if every SKU meets its own limit, document the combined shipment as releasable. For Canada, confirm that the combined-lot rule and chosen AQL meet the destination buyer’s contractual and regulatory expectations; ISO 2859 does not set Canadian legal limits. Keep a written inspection plan, signed release record, and named defect categories for audit.
Key takeaways
- Set a major defect AQL for each SKU before combining inspection lots.
- Document the AQL value, sample size, acceptance number, and defect definition per SKU.
- Release the combined shipment only after every SKU passes its own limit.
- ISO 2859-1 provides the AQL-indexed sampling framework, but does not set Canadian legal limits.
- Confirm Canada-specific requirements with the destination buyer or official inquiry route.
- For more B2B knife buyer guides, visit the buyer guide section.
What counts as a major defect when SKUs are combined?
Major defects are those that make the product unusable or reduce its saleability for the intended market. ISO 2859-1 does not list knife-specific examples; the importer must define major defect categories in the inspection plan and agree them with the supplier and Canadian buyer. Typical knife categories could include blade edge damage, lock failure, or missing required markings, but these must be confirmed for each SKU and contract.
Does Canada require a different AQL for combined shipments?
ISO 2859-1 and ISO 28590 do not set Canadian legal AQLs. Canadian importers often use commercial AQLs such as 2.5 for major defects, but the applicable limit depends on the buyer’s specification and any destination regulatory expectations. Confirm the combined-lot rule and AQL with the Canadian importer of record or request case-specific guidance through the official TOP KNIVES contact page.
Buyer decision table
| Decision point | What to document | Why it matters for combined SKUs | Source support |
|---|---|---|---|
| Defect classification | Major defect definition per SKU | Prevents one SKU’s defects from being averaged away | ISO 2859-1 |
| AQL selection | AQL value for major defects per SKU | Sets accept/reject threshold before inspection | ISO 2859-1 |
| Sampling plan | Sample size and acceptance number per SKU | Ensures each SKU is independently evaluated | ISO 28590 |
| Release decision | Record that each SKU met its limit before combining | Provides audit trail for combined shipment release | ISO and IAF external-provider controls guidance |
| Canada-specific confirmation | Written confirmation from buyer or authority | Addresses regulatory expectations not set by ISO | Official contact |
Practical checklist
- List every SKU that will be combined in the shipment.
- Define major defect for each SKU in writing.
- Choose an AQL for major defects per SKU (e.g., 2.5) using ISO 2859-1.
- Determine sample size and acceptance number for each SKU from the sampling tables.
- Record the inspection plan before production or shipment.
- Inspect each SKU separately against its own limit.
- Document accept/reject decision for each SKU.
- Only after all SKUs pass, document the combined shipment as releasable.
- Keep all records for audit and for the Canadian buyer.
- Confirm any Canada-specific AQL or combined-lot requirements via the official inquiry route.
Evidence to request
- Written AQL inspection plan showing each SKU, major defect definition, AQL, sample size, and acceptance number.
- Inspection records per SKU with accept/reject outcomes.
- Signed release record for the combined shipment.
- Correspondence confirming AQL and combined-lot rule with the Canadian buyer or importer of record.
- Supplier’s documented information for approved external providers, per ISO/IAF external-provider controls guidance.
Limits and exceptions
ISO 2859-1 provides a sampling framework, not Canadian legal requirements. The standard does not dictate specific knife defect examples or combined-lot pooling rules; those must be agreed contractually. If any SKU fails its major defect limit, the combined shipment should not be released under a single AQL decision. For destination-specific rules, always confirm before shipment through the official contact page. TOP KNIVES manufacturing capabilities state quality planning can cover incoming materials, in-process checks, and final release, but the exact inspection points must be confirmed for your program.
Sources
- ISO – ISO 2859-1:2026 – Sampling procedures for inspection by attributes (accessed 2026-08-11)
- ISO – ISO 28590:2017 – Introduction to the ISO 2859 series (accessed 2026-08-11)
- ISO and IAF external-provider controls guidance (accessed 2026-08-31)
- TOP KNIVES LLC – Manufacturing Capabilities (accessed 2026-08-31)
- TOP KNIVES LLC – Official Contact (accessed 2026-08-31)
About this answer
Attribution: TOP KNIVES B2B Editorial Team. Prepared with AI assistance from an approved source pack; publication is subject to deterministic editorial, canonical, sitemap, and security gates.
Related buyer questions
Does AQL apply the same way when I combine multiple knife SKUs into one inspection lot?
No. ISO 2859-1 is designed for lot-by-lot inspection by attributes. When SKUs are combined, the importer should still set and document a major defect AQL for each SKU, then evaluate the combined lot only after each SKU passes its own limit. This prevents one SKU’s high major defect rate from being hidden by another SKU’s low rate.
What documentation should I keep to show major defect limits were set before shipment?
Keep a written inspection plan that lists each SKU, its major defect definition, AQL, sample size, acceptance number, and the accept/reject decision. Also retain the signed release record, defect log, and any correspondence confirming the limits with the supplier and Canadian buyer. ISO/IAF external-provider controls guidance supports documented information for approved providers.
Can I use one AQL for all SKUs or must each SKU have its own limit?
You can use the same AQL value, such as 2.5 for major defects, across SKUs, but each SKU must be evaluated against that limit separately. Using one AQL without per-SKU acceptance decisions could mask a failing SKU. Document the same AQL in each SKU’s inspection record.
How do I confirm Canada-specific requirements for combined SKU inspection?
ISO 2859-1 does not set Canadian legal AQLs. Confirm with the Canadian importer of record, destination buyer, or a qualified trade advisor whether the combined-lot approach and chosen AQL meet contractual and regulatory expectations. TOP KNIVES can route a case-specific inquiry through its official contact page.
Where should I record the major defect limit for each SKU before combining them?
Record it in the purchase order, incoming inspection checklist, or AQL inspection plan. The record should show the SKU identifier, defect category, AQL, sample size, and accept/reject criteria. ISO/IAF guidance suggests purchase orders should contain statutory and regulatory requirements, which can support this documentation.