The measurement uncertainty describes the range in which the “true” value of a measured variable lies with a given probability.
It is a measure of the reliability of a measurement result.
Factors that influence the measurement uncertainty
- analytical precision (repeatability)
- Calibration and reference materials
- Sample handling and device conditions
- Method deviations
Why is it important?
- It enables the objective evaluation of different measurement methods
- It describes the significance of clinical reference ranges
- It supports laboratories in complying with standards such as ISO 15189
EQA-Schemes help to realistically estimate measurement uncertainties by providing comparative data from many laboratories.
