Accuracy and Precision of Test Equipment required?

H

hfmm87

#1
Hi all,

I have a new question, right now we are having some trouble with the proper accuracy, resolution and precision needed from our test equipment for product acceptance.

The resolution part has been solved with gage tolerance specified in Minitab:

Gage tolerance < Process tolerance / 10
Process tolerance = allowable deviation
In the other hand I dont know how much accuracy and/or precision we need from a test equipment, how to calculate the accuracy needed for our product.
Some help in here, thanks
 
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J

JamesGarry

#2
Well, we don't know a great deal about your manufacturing process, product, or test methods so it's rather hard to give detailed advice.

While it's generally true that you'd like your testing equipment to have accuracy statistics that are comparable to its precision, I can imagine a situation where you need to measure something with far higher accuracy than precision, and vice-versa!

Check wikipedia's entry on 'Accuracy and precision'. See what I mean?

Feel free to pass on more details.
 

blueicecube2

Involved In Discussions
#3
you sound a lot like where I worked previously, where everything is 1:10 ratio (well almost)

use the same rule , 1:10 from beginning to the end, if TUR and TAR is far and beyond..
 
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