Title: Shewhart range chart
Long Title: IUPAC Gold Book - Shewhart range chart
DOI: 10.1351/goldbook.08128
Status: current

Definition
Shewhart control chart in which the ranges of measured quantity values are plotted against time.


Notes
1) The range is the greatest measured quantity value minus the least measured quantity value.
2) Warning and action limits are given in tables (for example) as a function of the number of measured quantity values (\(n\)) taken to obtain the range and of the expected average range.
3) Nordtest advises that for Shewhart range charts, the best samples to be used are test samples selected from among the samples to be analysed in that analytical run.

Related Terms
- Shewhart control chart: https://goldbook.iupac.org//terms/view/08125
- analytical run: https://goldbook.iupac.org//terms/view/08006

Source
- PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1041 (https://doi.org/10.1515/pac-2019-0819)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08128/html
- json: https://goldbook.iupac.org/terms/view/08128/json
- xml: https://goldbook.iupac.org/terms/view/08128/xml

Citation: Citation: 'Shewhart range chart' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08128
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Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-08-05T03:23:05+00:00