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.