Determination of the standard deviation for proficiency assessment from past participant’s performances

Côté, Isabelle M.; Robouch, P.; Robouch, B. V.; Bisson, David; Gamache, Philippe; LeBlanc, Alain; Dumas, Pierre; Pedneault, Michael

doi:10.1007/s00769-012-0906-2

Cited by 14 publications

(6 citation statements)

References 11 publications

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“…PT/ILC są szeroko stosowane do wielu celów, a ich wykorzystanie w skali międzynarodowej zwiększa się z roku na rok (1,2,(6)(7)(8)(9).…”

Section: Udział W Badaniu Biegłości [Profi Ciency Testing -Pt] Lub Po...unclassified

“…PT/ILC are widely used for many purposes, and their use on an international scale increases yearly (1,2,(6)(7)(8)(9). In addition to the previously mentioned PT/ILC objectives related to the accreditation process, laboratories participating in PT/ILC identify problems, implement necessary corrective and preventive actions, increase trust in their actions among clients, and identify differences from other laboratories participating in these programs.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the possibility of using the measurement of open time to assess and verify the constancy of performance of cementitious ceramic tile adhesives

Stancu¹,

Dębski²,

Michalak³

2022

Cement Wapno Beton

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The study analyzed the results of open time measurements of ceramic tile adhesives after not less than 30 minutes, obtained by 27 laboratories participating in the interlaboratory comparison program. The obtained results were statistically analyzed following the requirements of ISO 13528 and assessed under the z-score analysis criteria contained in the EN ISO/IEC 17043. 22 out of 24 laboratories that sent the results of the open time measurement confirmed their competencies, obtaining a “satisfactory” result following the evaluation criteria. The result obtained by one laboratory was classified as “questionable”, and another received the result as “unsatisfactory”. From the perspective of laboratories participating in interlaboratory comparisons, the obtained results should be assessed as satisfactory, and thus the laboratories confirm their competence. However, a wide scatter of the results of the open time measurement should be noted – 22 laboratories, the results of which were classified as “satisfactory”, obtained results from 0.1 N/mm2 to 1.0 N/mm2. Such a wide scatter of the results of open time measurements determined by the adhesion strength indicates that this method has too little accuracy, and it should not be used in the assessment and verification of constancy of performance of ceramic tile adhesives.

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“…PT/ILC są szeroko stosowane do wielu celów, a ich wykorzystanie w skali międzynarodowej zwiększa się z roku na rok (1,2,(6)(7)(8)(9).…”

Section: Udział W Badaniu Biegłości [Profi Ciency Testing -Pt] Lub Po...unclassified

Section: Introductionmentioning

confidence: 99%

Assessment of the possibility of using the measurement of open time to assess and verify the constancy of performance of cementitious ceramic tile adhesives

Stancu¹,

Dębski²,

Michalak³

2022

Cement Wapno Beton

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“…The formula has been used in method validation (11,12 ), total error estimation (13 ), and EQA schemes for analytical methods applied in the food industry and the environmental sector (10,14,15 ). So far, only 1 application in the clinical laboratory has been described (16 ). In EQA settings, the formula can be considered an alternative to the Horwitz function (3 ) with a wider applicability (1 ).…”

confidence: 99%

Application of the Characteristic Function to Evaluate and Compare Analytical Variability in an External Quality Assessment Scheme for Serum Ethanol

et al. 2015

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BACKGROUND:As a cornerstone of quality management in the laboratory, External Quality Assessment (EQA) schemes are used to assess laboratory and analytical method performance. The characteristic function is used to describe the relation between the target concentration and the EQA standard deviation, which is an essential part of the evaluation process. The characteristic function is also used to compare the variability of different analytical methods.

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“…Possible statistical approaches have been further elaborated using an example of measured fat concentrations by LaBudde [7]. The practical use has been demonstrated for a number of chemical analytical parameters, for example, in water by Koch and Magnusson [8], in blood and urine by Côté et al [9], pesticide residues in olive oil by Stefanelli et al [10] and in plastics by the author of this article [11]. Jarvis et al [12] gave an example for microbiological examinations of foods.…”

Section: Introductionmentioning

confidence: 99%

Estimation of reproducibility and measurement uncertainty of a viscosity test method from proficiency test data

Visser¹,

Nijssen-Wester²

2015

Accred Qual Assur

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Evaluation of laboratory test results in a proficiency test should preferably be done against a predetermined standard deviation. This standard deviation may be derived from the reproducibility of a standardized test method. However, in practice, the respective test method may lack precision data. The often used alternative, the use of a characteristic function, of which the Horwitz function is the most well known, is only applicable for chemical parameters where the concentration of an analyte is measured. For physical parameters, like viscosity, the concentration-dependent functions cannot be used. In this article, an example is presented on the estimation of the reproducibility (reproducibility limit R) and the measurement uncertainty of a viscosity test method from historical proficiency test data.

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Determination of the standard deviation for proficiency assessment from past participant’s performances

Cited by 14 publications

References 11 publications

Assessment of the possibility of using the measurement of open time to assess and verify the constancy of performance of cementitious ceramic tile adhesives

Assessment of the possibility of using the measurement of open time to assess and verify the constancy of performance of cementitious ceramic tile adhesives

Application of the Characteristic Function to Evaluate and Compare Analytical Variability in an External Quality Assessment Scheme for Serum Ethanol

Estimation of reproducibility and measurement uncertainty of a viscosity test method from proficiency test data

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