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Comparing Two Histograms in Excel

View Before and After Histograms Side by Side

It's hard enough to create one histogram using Excel's Data Analysis Toolpack much less two histograms side by side. But its easy with the QI Macros Excel Histogram Template

Creating Side by Side Histograms is Easy Using QI Macros

compare two histograms side by side in the same Excel worksheet

Just click on the QI Macros Menu in Excel and select Capability Templates, Histogram with Cp Cpk.
Then select the second worksheet tab "Compare 2 Histograms."
To switch between estimators, change cell V2 to 1) Pooled SD, 2) Sbar or 3) Rbar estimators,

Input the data and spec limits for both histograms in the yellow shaded input areas.
- Histogram 1: data in columns A to E and spec limits in P1 and P2.
- Histogram 2 : data in columns F to J and spec limits in Z1 and Z2.
The histograms with bell curves are created to the right. Right click on the Y axis to change minimum or maximun values if you want the scales to be the same.
Process capability metrics Cp Cpk Pp Ppk are also calculated for comparison.