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Liner dim. and rounding

I have a question guys. When the drawing callout is to 3 decimal places example 1.000 +/-.005, for part acceptance should be rounded off to 3 decimal as well or not? if the actual is .9946, can it be reported as .995?

I am looking for something in the standard y14.5 -94/2009 , PWA360 or really any other where it would explain how dimension should be reported and to how many decimals.

I've been reading some older threads, and came across a statement that explains per y14.5-2009 that all linear dim. are absolute regardless of number of decimal used as if they did continued with zeroes. So, if my interpretation of this statement is correct, then for the dim 1.000 +/.005 with a 10:1 resolution rule (of the tolerance), I would have to measure the feature to 3 decimal, and with an actual being .995 not .9946 ?

However if I have a dim 1.000 +/-.002, using the same 10:1 rule, I would then have to measure the feature to .0002 resolution, and with actual being .9946, it would make it OOT correct? and I cannot report it as .995 right?
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  • Interestingly enough, this question always occur in connection with a minuscle amount OUTOFTOL- it seems no-one *ever* questions the result which is equally minuscle INTOL.

    To be 'correct', a band around the toleranced limit, as wide as your uncertainty, should really be colored "UNDECIDED", neither INTOL nor OUTTOL. No easy feat, though, as it is difficult to establish actual uncertainty, and PC-DMIS don't give us color bands on the OUT side...
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  • Interestingly enough, this question always occur in connection with a minuscle amount OUTOFTOL- it seems no-one *ever* questions the result which is equally minuscle INTOL.

    To be 'correct', a band around the toleranced limit, as wide as your uncertainty, should really be colored "UNDECIDED", neither INTOL nor OUTTOL. No easy feat, though, as it is difficult to establish actual uncertainty, and PC-DMIS don't give us color bands on the OUT side...
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