D
Dr. Electron
Greetings all!
One of our customers reports decimals out to three significant digits after the decimal (.XXX) on their drawings, but will reject the lot if they find any measurement that is not less...but rounds to .XXX. These are very tight tolerances being met with very good but barely capable measurement systems (i.e. the process is capable but the parts can't be measured reliably with current tolerance window).
I am torn on this...as I think the customer should almost always be accommodated...but the other side of me cries ASME Y14.5 standards (called out on their spec) require that any basic dimensions and related feature control blocks be the same number of decimal places. I.E. if a tolerance is set at .XXX, it must be reported at .XXX....I can't ignore the existence of significant digits...my 10th grade science teacher will haunt me in nightmares! And that just isn't healthy. Am I right in sticking to the standard or do I ignore scientific convention and go with the customer?
One of our customers reports decimals out to three significant digits after the decimal (.XXX) on their drawings, but will reject the lot if they find any measurement that is not less...but rounds to .XXX. These are very tight tolerances being met with very good but barely capable measurement systems (i.e. the process is capable but the parts can't be measured reliably with current tolerance window).
I am torn on this...as I think the customer should almost always be accommodated...but the other side of me cries ASME Y14.5 standards (called out on their spec) require that any basic dimensions and related feature control blocks be the same number of decimal places. I.E. if a tolerance is set at .XXX, it must be reported at .XXX....I can't ignore the existence of significant digits...my 10th grade science teacher will haunt me in nightmares! And that just isn't healthy. Am I right in sticking to the standard or do I ignore scientific convention and go with the customer?