TS ISO 28590

TS ISO 28590 is an introductory standard for acceptance sampling by attributes and explains how the ISO 2859 series is organised. Rather than defining a single acceptance plan, it helps the reader understand the different sampling systems in the family and the situations in which they are typically considered. Attribute inspection evaluates items by discrete characteristics such as conforming/nonconforming rather than by a continuous numerical measurement.

How the ISO 2859 family fits together

This standard provides a brief summary of the attribute sampling schemes and plans used in ISO 2859-1, ISO 2859-2, ISO 2859-3, ISO 2859-4 and ISO 2859-5. In general technical terms, acceptance sampling allows a decision about a lot or process based on a sample instead of inspecting everything. That approach can reduce inspection effort while still supporting controlled decision-making. The appropriate plan depends on the inspection objective, the lot structure, process stability and the quality level that is being targeted.

Why the choice of inspection system matters

Attribute-based inspection is used when the key question is whether an item passes or fails a defined requirement. Some sampling systems are based on single sampling, while others use sequential or multi-stage decision making, and some are intended for special contexts such as isolated lots or plans indexed to a quality limit. TS ISO 28590 gives a conceptual framework for understanding these alternatives and for selecting an inspection system suited to a particular situation.

• What acceptance sampling by attributes means in practice
• A concise overview of the plan types used across the ISO 2859 series
• General guidance for choosing among inspection systems
• Evaluation based on classification rather than continuous measurement