# Gauge R & R Data Analysis

Use this option to analyze the results of the study carried out for the gauge i.e. Instrument. You can also view Percentage R&R result using the Average And Range method and ANOVA method.

Completed studies from all the stations are displayed in this screen. Completed studies are those studies for which all trials have been completed using the Gauge R&R Mapping option. If no Gauge R&R study has been closed from any station then the message ‘No studies have been closed’ is displayed.

Select Station No. from the drop down list which displays all stations from which Gauge R & R study has been carried out and completed. Select Instrument Code from the drop down list which displays the instruments for the selected Station No. for which studies have been closed. Select Part Code from the drop down list which displays the related parts for the selected Station No. and Instrument Code. Select Parameter Code from the drop down list which displays the related parameters for the selected Station No., Instrument Code and Part Code.

The Process Variation or Tolerance value options are visible on the screen only if a value has been entered for these respectively for the selected study while mapping.

If only Tolerance value has been entered for the selected study then on the Data Analysis screen the Total Variation and Tolerance options are visible. If Process Variation has been entered then Total Variation and Process Variation options are visible.

If both the values are entered for the study then all the three options are visible on the screen.

Select the required option from Total Variation, Process Variation, Tolerance or Pp method. Total Variation is selected by default. You may select Process Variation or Tolerance only if values have been specified in the related fields for the selected record in the Gauge R & R Mapping screen.

Study Date, End Date (i.e. the date when the last trial was taken), calculated values of % R & R (Average and Range Method) and % R & R (ANOVA Method) for the Station No, Instrument Code, Part Code and Parameter Code are displayed in the grid based on selection of Total Variation, Process Variation or Tolerance options.

Click Avg & Range Report to view the Gauge R & R Report (Average And Range Method).

Click ANOVA Report to view the Gauge R & R Report (ANOVA Method).

Click Chart to view the Chart for Gauge R & R.

### Calculate %R&R for average and Range Method and ANOVA method using Pp method.

### To use the Pp option, use the following TV in the GRR analysis [ANOVA and Average & Range Report].

Pp = USL-LSL/6 Sigmap = USL – LSL / 6s = USL-LSL/6TV

Then TV = USL – LSL / 6 Pp

And PV = Square root (TV2 – GRR2)

When using the Pp approach to TV, the calculation for ndc is

TV2 = PV2 + GRR2

Or PV2 = TV2 - GRR2

Then

ndc = 1.41(PV/GRR) = 1.41 Square root (T V2 – GRR2) / GRR