  Reliable predictions of nuclear properties are needed as much to answer
fundamental science questions as in applications such as reactor physics or
data evaluation. Nuclear density functional theory is currently the only
microscopic, global approach to nuclear structure that is applicable throughout
the nuclear chart. In the past few years, a lot of effort has been devoted to
setting up a general methodology to assess theoretical uncertainties in nuclear
DFT calculations. In this paper, we summarize some of the recent progress in
this direction. Most of the new material discussed here will be be published in
separate articles.
