The method differs from other methods in that the data is qualitatively analysed and compared to the
four most likely degradation types. If it falls in one of these categories an assessment of the mechanism
can be given and a model is present to extrapolate the data to longer time periods. Examples are given
where the proper analysis of the data lead to a correct assessment, whereas an oversimplified analysis
(based only on the low frequency data) would yield an erroneous result.