A survey on unplanned shutdown has been conducted.  11 categories have been defined as potentail cause for the unplanned shutdown.  Results, whch are presented anonymous, give a good indication about the probelsm plants are suffering.  It will still be possible to particpate in the survey. At a regular basis updates will be send to the particpants. The survey is as well open for non-Prewijn particpants. After submission your data you will receive the results of the survey.