The info are needed for reliability analysis and to zoom
in into possible areas of concern.
From the article at unitedvalve it seems that manufacturing
processes need to be controlled.
We have four 200mm plug valves that are used for preventing over-speed of a turbine. If these valves fail we need a redundant system of independant valves.
According to our Reliabilty department this independant system should not be a typical valve arrangement(i.e. plug-, butterfly-,ball- or...