caa a22 4500 605465924 CHVBK 20210128100304.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00769-015-1146-z doi (NATIONALLICENCE)springer-10.1007/s00769-015-1146-z James Vivienne UK NEQAS for Microbiology, External Quality Assurance Department, Public Health England, 61 Colindale Avenue, NW9 5EQ, London, UK aut Harmonisation of performance assessment in qualitative PT/EQA [Elektronische Daten] [Vivienne James] Evaluation of participant performance is a prerequisite in EQA scheme design. At its most basic the evaluation is used to determine whether the result reported is correct or not. This of course requires a means of determining the correct result. For qualitative testing where the result is presence or absence, assignment of the correct result is simple. Where the result requires accurate identification/interpretation, there may be a sliding scale for grading how close the reported result is to the assigned result. For quantitative PT/EQA schemes variability of the reported result from the correct result (assigned value) can be assessed in terms of precision, accuracy and bias using statistical tools to determine acceptability. The statistical tools commonly used are described in ISO 13528. Performance assessment is often based on the difference between the reported result and the assigned value and a performance score assigned. For qualitative PT/EQA schemes there is no commonly accepted statistical evaluation. Some providers apply scoring schemes to transform qualitative results into quantifiable data that can then be used to apply a performance score. However, scoring schemes vary and are not universally applied, challenges are not necessarily equivalent and many providers only assess acceptability of performance on an annual basis following completion of several PT/EQA rounds. Use of a harmonised approach across all PT/EQA schemes is seen by some as the Holy Grail with the performance understood by participants, their customers and other stakeholders. The issues associated with harmonisation of performance assessment will be discussed. Springer-Verlag Berlin Heidelberg, 2015 EQA nationallicence Harmonisation nationallicence Qualitative nationallicence Performance nationallicence PT nationallicence Score nationallicence Accreditation and Quality Assurance Springer Berlin Heidelberg 20/4(2015-08-01), 335-338 0949-1775 20:4<335 2015 20 769 https://doi.org/10.1007/s00769-015-1146-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00769-015-1146-z text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- James Vivienne UK NEQAS for Microbiology, External Quality Assurance Department, Public Health England, 61 Colindale Avenue, NW9 5EQ, London, UK aut NATIONALLICENCE 773 0- Accreditation and Quality Assurance Springer Berlin Heidelberg 20/4(2015-08-01), 335-338 0949-1775 20:4<335 2015 20 769