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X Chart

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File:Xbar Control Chart.png
An Example of a Xbar Control Chart

Xbar control charts are a type of process monitoring chart used when the characteristic being watched is variable. Xbar charts monitor the mean of the quality characteristic and are often combined with an R or S chart to monitor the variability.


Shewhart X-bar and R and S Control Charts NIST Engineering and Statistics Handbook

Xbar and R Chart Example

Forum Discussions

Does the type of out control point indicate root cause?

Control Chart Rules - Trend and Statistics Explainations


Cumulative Sum Control Charts

Exponentially Weighted Moving Average (EWMA) Control Charts