I seen a short article by Michael Levy who is the practice manager of quality systems for the Virginia Philpott Manufacturing Extension Partnership and who is working in a cooperative arrangement with NIST. His article raised a question with me that I have not been able to find an answer too. In his article he stated; "that those laboratories that are tightly linked to production processes are required to seek accreditation." My understanding to date had been that if we are not selling lab services then we were not required to seek accreditation for an in-house lab. By the way we are a manufacturer of automotive parts for both OEM and the aftermarket. We do business with the big three as well as with a number of other companies that subscribe to QS9000. Can anyone shed some light on this subject? I went through several posted threads but did not find a specific answer to this question.