Kordatavusest

Kordatavusest is not a widely established term in Estonian or other languages. It is likely a misspelling or inflected form of kordatavus, the Estonian word for repeatability. As there is no independently recognized concept by that exact name, this article explains kordatavus and its relevance in measurement science.

Kordatavus, or repeatability, describes how closely successive measurements of the same quantity agree when the measurement process is kept essentially unchanged: same method, same instrument, same operator, and short time interval. It is a statement of intra-condition precision and is typically quantified by repeated trials, reporting metrics such as standard deviation or variance.

Repeatability is distinguished from reproducibility, which assesses variation when conditions are allowed to vary, such as different operators, instruments, locations, or times. In metrology, both concepts are used to characterize a measurement system's overall precision.

Etymology and form: kordatavus is formed from the Estonian root kord- meaning "occurrence" or "time" with the suffix -atavus indicating a state; the genitive kordatavusest would be used in context. In standard texts, kordatavus is treated as the quality of producing consistent results under fixed conditions.

Applications and standards: Kordatavus is an essential component in calibration, quality control, and method validation. Standards such as ISO 5725 and the Guide to the Expression of Uncertainty in Measurement address repeatability as part of evaluating measurement precision and uncertainty.