EffiValidation 3.0 is a compliance-ready ISO 17025 and GxP laboratory software.


Uncertainty is a parameter associated with the result of a measurement, that characterises the dispersion of the values that could reasonably be attributed to the measurand. The parameter may be, for example, a standard deviation, or the width of a confidence interval.

Uncertainty of measurement comprises, in general, many components. Some of these components may be evaluated from the statistical distribution of the results of series of measurements and can be characterised by standard deviations. The other components, which also can be characterised by standard deviations, are evaluated from assumed probability distributions based on experience or other information. The ISO Guide refers to these different cases as Type A and Type B estimations respectively.

EffiValidation 3.0: Example of the Uncertainty determination from Partial Uncertainties

Uncertainties - from partial uncertainties.jpg