User's Manual Part 2

♦195♦ MEGAM.O.L.E.® Help System Guide
5.4.5.3. R Chart
The R Chart is the graphical chart produced from samples of a flagged parameter on
the Spreadsheet Page Tab. The R-Bar is the averages of the range samples.
If the Sub-Group size on the SPC Page Tab of the Preferences dialog box is
set to 1, the R chart becomes a moving range (mR) chart. The moving range is
the difference between a specified X value and the one preceding it.
The calculation numbers vary depending on the data in the Spreadsheet Page
Tab. Using the filter function or the hide command allows the user to select the
specific data runs to include on the SPC chart.