Table 31. Interpretation of measurements uncertainties and their calculation.

Recommended practice	Calculation with recognized components (accuracy and precision) and comparison with limits calculated according to the same formulae. Define performance requirements for clinicians in interpreting results. Compare the results of the calculated uncertainty of measurement with other laboratories. Periodically evaluate the accuracy or correctness of the method change and recalculate the MU if necessary, at the medical level of the decision. Use MU around the medical decision threshold for data interpretation. All biologists interpreting the results must be aware of this information and make it available to prescribers.
Acceptable practice	A calculation made by an organizing body is acceptable. As part of the estimation of the MU, a provisional comparison with the total error is acceptable, pending a calculation taking into account the quadratic propagation of the imprecision and trueness components.
Unacceptable practice	No calculation of the MU and/or incorrect calculation formula.
MU –measurement uncertainty.