A: Look, this is your product! Easy to break and easy to burst!
B: Oh, that's not true. It was broken because of the improper usage.
A: Improper? Look! This is your instruction and we just follow what it says. And according to the ISO international standard, this should be classfied as the unqualified product! We will return this batch and you should return our money.
B: Oh, that's not the case! Our product process is always strictly follow the ISO standard and we get the certification. Maybe this one did have problem but it doesn't mean that this batch are all unquallified.
A: Please don't forget our contract! You have promised that
your company were willing to compensate all cost for the unqualified products.
B: Yes, that's true. We will certainly pay the unqualified ones but not all products we have sent to you. If you have the further certification and tests result for all the unqualified products, we will pay for it.