Guidelines for the use of statistics and statistical tools on life data

In practice, the life and failure data of utilities often is incomplete, inhomogeneous and of small quantity. The work of WG D1.39 was aimed at providing guidelines to tackle these questions in practice. To that purpose, a number of statistical approaches were studied for the analysis of life-data and failure data of high voltage components installed in the power network. Three case studies from different countries are presented that introduce various approaches that can be taken.