Developments in uncertainty analysis for individual monitoring.

Uncertainty analysis is an important part of the quality management programme of an individual monitoring service. Evaluating the uncertainty in measurement is quantifying the quality of measurement. This is emphasised by the recent publication of documents and standards that give guidance on how to perform such an analysis. This paper discusses some aspects of this guidance using a hypothetical dosemeter as an example. It is argued that for personal dosemeters with possibly large uncertainties caused by the energy and angle dependence of the response, the numerical method for the propagation of distributions as described in the Supplement 1 to the 'Guide to the expression of uncertainty in measurement' is the preferred method.