TSE 2756-7 ISO/TR 8550

TSE 2756-7 ISO/TR 8550 is a technical reference on the general guidance used to select an acceptance sampling system, scheme, or plan for inspection of discrete items in lots. It helps users understand how different sampling arrangements are chosen in a quality-assurance context; in other words, it is about selection logic rather than prescribing a single test procedure.

The technical basis of acceptance sampling

Acceptance sampling makes a decision about a lot by examining selected items instead of inspecting every unit. The method provides a statistical basis for deciding whether the lot should be accepted or rejected. Discrete items are countable individual units, and the inspection outcome is often treated in categorical terms such as conforming / nonconforming or accept / reject. In this setting, the words system, scheme, and plan refer to different combinations of sample size, acceptance number, and decision rule.

What this document provides, and what it does not

• General guidance for selecting a sampling system, scheme, or plan.
• A framework for acceptance decisions in lots of discrete products.
• Conceptual support for choosing among common acceptance sampling approaches.
• Selection guidance rather than a single mandatory plan for every industry.

This standard is especially relevant where statistical inspection and quality control must balance cost, time, and inspection coverage. The choice of a sampling plan depends on factors such as product homogeneity, lot structure, risk level, and the purpose of inspection. For that reason, the document offers a structured conceptual basis for users who need to evaluate different acceptance sampling approaches in practice.

As a withdrawn publication, it retains historical and reference value, particularly for users working with older quality-assurance documentation and terminology.