IEC/TR 61000-1-6:2012(E), which is a technical report, provides methods and background information for the assessment of measurement uncertainty. It gives guidance to cover general measurement uncertainty considerations within the IEC 61000 series. The objectives of this Technical Report are to give advice to technical committees, product committees and conformity assessment bodies on the development of measurement uncertainty budgets; to allow the comparison of these budgets between laboratories that have similar influence quantities; and to align the treatment of measurement uncertainty across the EMC committees of the IEC. It gives a description for: - a method for the assessment of measurement uncertainty; - mathematical formulas for probability density functions; - analytical assessment of statistical evaluations; - correction of measured data; and - documentation. This Technical Report is not intended to summarize all measurement uncertainty influence quantities nor is it intended to define how measurement uncertainty is to be taken into account in determining compliance with an EMC requirement. The contents of the corrigendum of october 2014 have been included in this copy.