TS 2756-1

TS 2756-1 is a standard for sampling plans used in inspection by attributes, specifically those indexed by an acceptable quality level (AQL) for lot-by-lot inspection. In practical quality control, this means decisions are made from sampled items rather than by examining every unit in the lot, using a statistical framework to support acceptance or rejection.

What AQL-based sampling means in practice

AQL is a reference quality level used in sampling inspection to express the worst tolerable process quality that is still considered acceptable for a lot under the plan. As general technical context, these plans do not eliminate variation; instead, they provide a consistent way to judge whether a lot is acceptable based on the observed number of nonconforming items or defects in the sample. Inspection by attributes classifies items as conforming or nonconforming rather than focusing on measured numerical values.

What this standard covers

This standard covers the sampling procedures indexed by acceptable quality level. In other words, its focus is on the rules for selecting and applying sampling plans in lot-by-lot inspection. Such plans help relate lot size, selected AQL, and inspection outcome to an acceptance decision; however, the detailed tables and decision rules should not be inferred beyond the information given here.

• Inspection type: inspection by attributes
• Scope: lot-by-lot inspection
• Core index: acceptable quality level (AQL)
• Purpose: acceptance/rejection decisions based on sampling

TS 2756-1 was prepared on the basis of ISO 2859-1:1989 and has since been withdrawn. It remains a useful technical reference for understanding classic acceptance sampling practice and the logic of lot inspection.