Appreciate this kindly confirmation. I assumed they are pretty similar with very little difference and guess a checklist can help me map to find the gap. As for your comment on "product audit", I think that is mixed with "process audit" or perhaps with the new term of "line-side audit" from PSB training. I can distinguish the former 2 by VDA6.5 and VDA6.3. However, if the customer didn't request VDA criteria, it is not easy to have other substitutes, like using control plan which covers both "process" and "product" characteristics to audit, and "layer process audit" which also includes "product audit". Pardon me for my further questions, but I just don't understand why so many fancy words that makes simple things so complicated.