The Gage Linearity and Bias Study can be used to determine the accuracy of your measurements through the expected measurement range. In other words, it can help you determine if your gage has the same accuracy when measuring objects of different sizes and if your gage is biased when compared to a master value.
At the Excel Menu (For Excel 2007, go to Add-ins first)
Choose ProcessMA > Quality Tools > Gage R and R > Gage Linearity and Bias Study
In Measurement, select the column containing measurement data (Numeric)
In Part, select the column containing part indicators (>=2 distinct values)
In Reference, select the column containing master measurements (Numeric)
In Process Variation , enter a value for the process standard deviation (Optional, Numeric, >0)
Click OK
You want to determine the accuracy of the measurement gage in your plant. You selected five parts to study which represented the range of measurements that you need to take. You also have the master value for each of these five parts. You got an operator to measure the parts in random and 10 times each.
Open data worksheet by choosing ProcessMA > Tools > Data
Choose ProcessMA > Quality Tools > Gage R and R > Gage Linearity and Bias Study
In Measurement, select AT - Readings
In Part, select AU - Samples
In Reference, select AV - Reference
Click OK
The gage linearity and gage bias account for 1.3% and 5.8% of the overall process variation respectively.
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