PAR, or Preventive Action Request, is very similar to CAR. PAR is also one of the most widely used terms for Preventive Actions by companies that are ISO certified. We use PARs to conduct an investigation to find the root cause(s) of a potential problem so that this possible problem does not come to pass. As with CAR, PAR refers to all steps of Preventive Action, not just the Request portion as the name might imply. Again, when the Preventive Action moves to Root Cause Investigation, we don't switch the name to PARC but wrongly continue to call it PAR until closure. Therefore, in my view, PAR is not good nomenclature for Preventive Actions.