Yes!
I agree 100%. And I want to apologize for not realizing that this was an automotive thread topic - I do not work for a shop in that industry and we're not QS 9000. I must have been asleep this morning when I posted!
But as to your reply, I was told "I could investigate all day and not know what happened to that material."
Which tells me there probably was NO investigation. Just guesses made.
So the Purchasing Manager's suggestion was to take this to the Vice President, my boss. Which I will. My gut tells me that the VP will want Preventive Actions for the 4 possible causes which will cause massive amounts of complaints about being buried with paperwork...I can hear it already!
I find in a lot of cases that these are good people I'm dealing with who feel they are too busy to 'drop everything' and deal with a quality issue.