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{{Language_sel|LANG=ger|ARTIKEL=Ringversuch}}
{{PSM_Infobox}}
<span style="font-size:1.2em;font-weight:bold;">Round robin test</span>
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==General information==

A round robin test is a widely used method for external quality comparison of measurement procedures in frequently nationally accredited testing laboratories (see: [[Accreditation and Certification|Accreditation and certification]]). Basically, test [[Specimen|specimens]] manufactured by a manufacturer or a participating testing laboratory are examined using identical methods and evaluation procedures. The comparison of the results allows statements to be made about the [[Measuring Accuracy|measuring accuracy]] in general or about the measurement quality of the participating institutes. Ring tests are also used to validate regulations for measurement procedures.

For example, accredited testing laboratories must regularly participate in round robin tests in accordance with the ISO/IEC 17025 standard or as part of state approval procedures in order to ensure and prove the quality of their results.

==Institutes that organise round robin tests in the field of polymer testing==

* Kunststoff-Institut Lüdenscheid für die mittelständische Wirtschaft NRW GmbH, Karolinenstr. 8, 58507 Lüdenscheid; https://kunststoff-institut.de/
* Deutsches Institut für Ringversuche (DIR), Karolinenstr. 8, 58507 Lüdenscheid; https://dir-kimw.de/
* Öfi – Österreichisches Forschungsinstitut für Chemie und Technik, Franz-Grill-Str. 5, A-1030 Wien; https://www.ofi.at/
* DRRR – Deutsches Referenzbüro für Ringversuche und Referenzmaterialien GmbH, Bodmanstraße 4, D-87435 Kempten; https://drrr.de/
* IfEP – Institut für Eignungsprüfung, Daimlerstraße 8, 45770 Marl; https://ifep.de/

==Tasks of the testing institutes for round robin tests==

The organiser of a round robin test provides the participating laboratories with the test [[Specimen|specimens]] to be examined and instructions on how to carry out the test. They then collect the measurement data and evaluate it statistically. The participants, whose anonymity is preserved, are informed of the results. Round robin tests are therefore particularly suitable for detecting any systematic [[Measurement Deviation|measurement deviations]] or for avoiding poor precision in one's own laboratory. Round robin tests are a suitable element of quality management for the manager of an accredited testing laboratory.

==See also==

* [[Accreditation and Certification|Accreditation and certification]]
* [[Bundesanstalt für Materialforschung und -prüfung]] (BAM)
* [[Polymer Service GmbH Merseburg|Polymer Service GmbH Merseburg]]

'''References'''

* ISO/IEC 17025 (2017-11): General Requirements for the Competence and Calibration Laboratories
* ISO/IEC 17043 (2023-05): Conformity Assessment – General Requirements for the Competence of Proficiency Testing Providers
* ISO 13528 (2022-08): Statistical Methods for Use in Proficiency by Interlaboratory Comparison
* DIN-Taschenbuch 355 (2004-01): Statistik – Genauigkeit von Messungen – Ringversuche, ISBN: 978-3410157526

[[Category:Measurement Testing Technology]]

Round Robin Test - Revision history