This application simulates the Xbar control chart, one of the tools of statistical quality control, or statistical process control (SPC).

It computes the ARL for different mean and sigma shifts. Concretely, the shifts are measured by d = abs(m1 - m0) / sigma0 and by r = sigma1 / sigma0.

The control limits can be placed at 2 or 3 sigma. In addition, it is possible to change the sample size.

In addition, it simulates the real performance of the Xbar control chart (real in-control and out-of-control ARL) when mean and sigma are estimated during Phase I.

At this moment the application languages are Spanish and English.

This application is also available for other platforms. Just search in their stores.