Participant performance evaluation
This is an evaluation of a participant’s measuring performance compared with other laboratories using the same methods. International and regional schemes can be used to assess one or more of the following:
- The quality of the analytical performance of the participant’s laboratory
- The state of the art of participating laboratories
- Intralaboratory variation
- Interlaboratory variation
- Relationship between calibration procedures and analytical results
- Relationship between analytical procedures and results
- Relationship between commercial reagents and results
- Relationship between analytical instruments and results
- State-of-the-art values for concentration of the analytes
- Systematic deviations for the individual laboratory from state-of-the-art values or reference target values
A well-designed EQA Scheme should provide information on most of the ten points.
WEQAS easily fulfils these aims and offers its participants powerful statistical tools to identify and eliminate errors before the system is out of control. The linear panel of samples used in most WEQAS Schemes allow the evaluation of accuracy, within run precision and between batch precision.
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