How to interpret information from proficiency test exercises concerning the relative performance of accredited laboratories

Cortez, L.; Duarte, Armando C.; Hundewadt, A.; Schmidt, Anita; Steffen, B.; Tholen, Daniel; Fostel, H.; Papadakis, I.; Monte, Melinda; Boley, Nick; Berkel, P.M. van

doi:10.1007/s00769-003-0674-0

Cited by 7 publications

(5 citation statements)

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“…For the 3 laboratories that participated only once, their results may be misleading, because the round in question was one in which most laboratories had correct results. Conclusions drawn from single performance exercises should not be taken as representative of overall performance (Cortez et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Laboratories may exchange information or use subcontracting (Wood et al, 1998). The results from a proficiency testing scheme may be regarded as an indication of whether a laboratory, at its best, is able to perform a given analytical test and not necessarily whether their daily performance is adequate (Cortez et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

“…The general benefits of accreditation include increased productivity, improved performance, increased morale of staff, recognition and acceptance of competence, and increased ability to stay abreast of developments in requirements for competence and testing (Wiegers, 2002). Although accreditation alone cannot guarantee the quality of the data produced by the laboratory, it should decrease the frequency of incorrect results (Cortez et al, 2003). Requiring accreditation may be too stringent in an area such as this, in which accreditation services are not well developed.…”

Section: Discussionmentioning

confidence: 99%

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Interlaboratory Proficiency Testing as a Tool for Improving Performance in Laboratories Diagnosing Bovine Mastitis

Pitkälä

Gindonis²,

Wallin

et al. 2005

Journal of Dairy Science

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The National Veterinary and Food Research Institute (Finland) and the Veterinary Laboratories Agency of the Quality Assurance Unit, Department for Environment, Food and Rural Affairs, United Kingdom (previously the Ministry of Agriculture, Fisheries and Food) organized a proficiency testing program for laboratories analyzing veterinary mastitis samples. Three test samples with lyophilized strains of common aerobic bacteria were sent to the participating laboratories 7 times between 2000 and 2003. The participants returned 98% of the requested data. The overall performance of the laboratories varied from 63 to 93% in different testing rounds. All laboratories diagnosed Staphylococcus aureus and Escherichia coli correctly at every round. Improvement in diagnosing individual bacteria was observed for Staphylococcus epidermidis, Streptococcus dysgalactiae, Enterococcus spp. and Klebsiella spp. The overall performance of the laboratories improved with increased participation. The educational role of the program was important. Laboratories working in the veterinary field should implement a documented quality system covering all functions of the laboratory, as well as a planned quality assurance system.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Interlaboratory Proficiency Testing as a Tool for Improving Performance in Laboratories Diagnosing Bovine Mastitis

Pitkälä

Gindonis²,

Wallin

et al. 2005

Journal of Dairy Science

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“…Comparisons between the two categories are further biased by the not unreahstic probability that mainly only the best and most quality conscious non-accredited laboratories participate under best measurement conditions [10]. The purpose of laboratory accreditation is obtaining objective evidence that the laboratory is competent for the task specified by itself on basis of the degree of trueness and precision required by its customers.…”

Section: Interlaboratory Comparisonsmentioning

confidence: 99%

Role and Evaluation of Interlaboratory Comparison Results in Laboratory Accreditation

Bode¹,

Cincu²,

Manea³

et al. 2008

AIP Conference Proceedings

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Participation in interlaboratory comparisons provides laboratories an opportunity for independent assessment of their analytical performance, both in absolute way and in comparison with those by other techniques. However, such comparisons are hindered by differences in the way laboratories participate, e.g. at best measurement capability or under routine conditions. Neutron activation analysis laboratories, determining total mass fractions, often see themselves classified as 'outliers' since the majority of other participants employ techniques with incomplete digestion methods. These considerations are discussed in relation to the way results from interlaboratory comparisons are evaluated by accreditation bodies following the requirements of Clause 5.9.1 of the ISO/IEC 17025:2005. The discussion and conclusions come largely forth from experiences in the author's own laboratory.

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“…Indeed, participation in PEs can help verify laboratory performance, identify areas for improvement, and improve quality of laboratory results [2][3][4][5][6][7][8][9]; however, the cost to participate in multi-laboratory PEs may be high, limiting the opportunity to participate. In 2008, Sacchini and Freeman identified a shortage of PT programs for veterinary laboratories [5].…”

Section: Introductionmentioning

confidence: 99%

A review of proficiency exercises offered by the Veterinary Laboratory Investigation and Response Network (Vet-LIRN) and Moffett Proficiency Testing Laboratory from 2012 to 2018

et al. 2021

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The Food and Drug Administration’s Veterinary Laboratory Investigation and Response Network is comprised of more than 40 animal diagnostic laboratories within North America and offers voluntary Proficiency Exercises to these participating laboratories. The joint Proficiency Exercise Program is run in collaboration with the Center for Food safety and Nutrition and Institute for Food safety and Health, located at the Moffett Proficiency Testing Laboratory. From 2012 to 2018, the Proficiency Exercise Program offered 20 proficiency tests or interlaboratory comparison exercises focused on veterinary analytes of interest. The program evaluated performance of laboratories, individual analysts, and the methods used. Over the six-year period, the program improved exercise schemes, as well as offered network laboratories exercises with analytes not routinely seen such as animal tissue with naturally occurring residues. Animal diagnostic laboratories can use performance results to assist with accreditation, demonstrate proficiency, and improve diagnostic capabilities.

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How to interpret information from proficiency test exercises concerning the relative performance of accredited laboratories

Cited by 7 publications

References 1 publication

Interlaboratory Proficiency Testing as a Tool for Improving Performance in Laboratories Diagnosing Bovine Mastitis

Interlaboratory Proficiency Testing as a Tool for Improving Performance in Laboratories Diagnosing Bovine Mastitis

Role and Evaluation of Interlaboratory Comparison Results in Laboratory Accreditation

A review of proficiency exercises offered by the Veterinary Laboratory Investigation and Response Network (Vet-LIRN) and Moffett Proficiency Testing Laboratory from 2012 to 2018

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