NDLI: Comparison of different approaches used for the interpretation and presentation of PT results

Content Provider	Springer Nature Link
Author	Jotavic, Aida Suljagic, Semsa
Copyright Year	2015
Abstract	The laboratory for precious metals within the Institute of Metrology of Bosnia and Herzegovina acts as a state reference laboratory in the field of quality control of articles manufactured of precious metals, e.g. jewellery. It disseminates reference values through the organisation of proficiency testing (PT) schemes. Two separate PT schemes for the determination of mass fraction of gold in typical jewellery alloys were conducted in 2013 and 2014. Laboratories taking part in these PT schemes are affiliated to the National Metrology Institutes of several countries and two private goldsmith laboratories. Different approaches in the design of the PT schemes and the evaluation of the PT results were used with the purpose of exploring their features regarding the interpretation of the results. For PT.13, z-scores were used as laboratory performance indicators. The assigned value and the standard deviation for proficiency assessment were calculated from the results of the participating laboratories by applying robust statistic. z-score and z′-score were used as performance indicators for the scheme PT.14, and the assigned value of the test sample and its measurement uncertainty were determined by the PT provider. The standard deviation of the testing method of 0.5 mg/g as prescribed in ISO 11426 as fit for purpose in the field of interest is used as standard deviation for proficiency assessment σ p. By comparing the z-scores and z′-scores assigned to the PT.14 results, it is evident that the measurement uncertainty of the assigned value provided by the PT provider does not affect the overall successfulness of the participants. The Q-score based on relative deviation was used as an alternative approach to identify future partners in PT schemes with the purpose of reference value assignment (Q ≤ 0.05).
Starting Page	395
Ending Page	399
Page Count	5
File Format	PDF
ISSN	09491775
Journal	Accreditation and Quality Assurance
Volume Number	20
Issue Number	5
e-ISSN	14320517
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-09-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	PT schemes Assigned value z-score z′-score Q-score Gold alloy Analytical Chemistry Food Science Biochemistry Commercial Law Ecotoxicology Marketing
Content Type	Text
Resource Type	Article
Subject	Chemistry Instrumentation Chemical Engineering Safety, Risk, Reliability and Quality

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Interpretation of interlaboratory comparison results to evaluate laboratory proficiency

Evaluating participant performance in qualitative PT/EQA schemes

Comparison of different approaches to the statistical evaluation of proficiency tests

CENAM - List of 14 PT schemes

Harmonisation of performance assessment in qualitative PT/EQA

LGC Limited (List of 9 PT schemes)

Evaluation of proficiency tests in microbiological analysis: enumeration of aerobic microorganisms

Qualitative PT data analysis with easy-to-interpret scores

Visualisation of interlaboratory comparison results in PomPlots

Comparison of different approaches used for the interpretation and presentation of PT results

Similar Documents

Interpretation of interlaboratory comparison results to evaluate laboratory proficiency

Evaluating participant performance in qualitative PT/EQA schemes

Comparison of different approaches to the statistical evaluation of proficiency tests

CENAM - List of 14 PT schemes

Harmonisation of performance assessment in qualitative PT/EQA

LGC Limited (List of 9 PT schemes)

Evaluation of proficiency tests in microbiological analysis: enumeration of aerobic microorganisms

Qualitative PT data analysis with easy-to-interpret scores

Visualisation of interlaboratory comparison results in PomPlots

Comparison of different approaches used for the interpretation and presentation of PT results