We've been treating our PFMEA as a "living document", i.e., we update it fairly frequently, with no real documentation or tracking of revision level. In our last audit, it was pointed out that we should update the rev level whenever we make updates. For every other doc in our system, we initiate a Change Order to change a doc revision. If we are going to track each and every update to our PFMEA, do we need to document this with a change order, too? Curious how others handle this. Thanks!