Gage Run Chart

Overview | How to | Example

 


 

Overview

The Gage Run Chart plots the measurements by operator and by part, and a reference line at the overall mean. It is used to visualise measurement between different operators and parts. If there are multiple trials, only the first 10 trials will be plotted.

 


 

How to

At the Excel Menu (For Excel 2007, go to Add-ins first)

  1. Choose ProcessMA > Quality Tools > Gage R and R > Gage Run Chart

  2. In Measurement, select the column containing measurement data (Numeric)

  3. In Part, select the column containing part indicators (>=2 distinct values)

  4. In Operator, select the column containing operator indicators

  5. In Trial, select the column containing trial numbers

  6. In Historical Mean, enter a value for the reference line, else the mean of the measurements will be used

  7. Click OK

 

 

Example

You collected measurements made by 3 different operators on 10 different parts. You want to use the Gage Run Chart to assess the measurement differences between operators and parts.

  1. Open data worksheet by choosing ProcessMA > Tools > Data

  2. Choose ProcessMA > Quality Tools > Gage R and R > Gage Run Chart

  3. In Measurement, select AQ - Measurement

  4. In Part, select AR - Part

  5. In Operator, select AS - Operator

  6. Click OK

 

Results & Interpretation

From the chart, it seems that most of the variation is due to differences between parts. It also appears that Operator 1 is relatively inconsistent and Operator 2’s second measurement is frequently smaller than the first measurement.

 


 

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