Notes and Considerations
Based on section 5-2.2 "Development and Use of X-bar and R Charts" in Statistical Quality Control (Montgomery).
This example uses the "qcc" library for the R statistical software system.
Data Set
The data is available at the bottom of the reference page
Statistical Quality Control (Montgomery)
File: Table 5-1 Flow Width.csv
(may also be found in file: Chapter_5_Examples.xls)
Table 5-1 "Flow Width Measurements (microns) for the Hard-Bake Process".
Analysis or Script File
See the R script file attached at the bottom of this page. [Example 1 X-bar and R chart (R).R.txt]
For a basic overview of how to conduct the analysis and generate the X-bar and S chart, see the document attached at the bottom of this page.
[Example 1 X-bar and R chart (R).doc]