Statistical Steven said:
Let's understand something. Most customers do not care about measurement error. How often do you buy something and ask what is the measuerment error on the deli scale? I give the customer alot of respect for asking how much of the tolerance does the measurement system take.
There are two sides to this, as with most stories. I think most customers care a great deal about meaurement error, or anything else that might negatively affect product quality; it's just that they don't
understand it. Often the level of concern only heightens when something bad happens. The OP is doing his best, it seems, to
prevent bad things from happening, and to protect his customer from his own ignorance. The deli scale analogy is apt, because we assume that there protections in place against inaccurate scales, so unless a person is very cynical, it's not a big concern. In manufacturing the same principle applies: our customers have a right to believe that we have protections in place, and should be able to assume that gages are regularly calibrated and that we have the expertise to assure that that an efficacious measurement system is in place.
Nonetheless, if the customer has his gun pointed at his foot and we repeatedly tell him that he should point it elsewhere, and in the end he shoots himself in the foot, then he has to be ready to accept the responsibility for it.