TS 5822-2 ISO 5725-2/D1

TS 5822-2 ISO 5725-2/D1 is a draft/document record for a standard dealing with precision as one dimension of measurement accuracy, with emphasis on how repeatability and reproducibility are determined through collaborative interlaboratory experiments. In metrology, precision describes how closely repeated results agree, making it a core concept when judging the reliability of a measurement method.

What distinguishes repeatability from reproducibility?

The subject of this standard is the shared experimental framework used to assess the same measurement method across laboratories and under differing conditions. Repeatability generally refers to the spread of results obtained under the same laboratory and closely matched conditions, while reproducibility extends the comparison to interlaboratory variation. That distinction matters because a method may appear stable within one setting yet behave differently when used by other operators, instruments, or laboratories.

Why collaborative interlaboratory studies matter

In general technical practice, collaborative studies are used to quantify method performance with data contributed by multiple laboratories. They can reveal sources of variation such as laboratory effects, operator differences, equipment, and environmental conditions. This standard amplifies the general principles for designing such experiments; it does not define a specific instrument, material class, or a single measurement procedure.

This record follows ISO 5725-2 and is marked as withdrawn. It represents the established statistical approach for examining the precision of measurement methods and is useful background for quality assurance, laboratory comparison, and method validation work within the broader metrological framework.