  Goal of these proceedings is to introduce a method based on event weighting
in particle physics experiments. Weighting means that events are not just
counted as integer numbers but are assigned a weight factor according to their
importance in the analysis. This method has a close connection to the maximum
likelihood method known to reach the smallest statistical error. The purpose of
this document is to give a more educational overview on the subject. As an
example the extraction of a beam polarization from scattered particles is
discussed.
