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

It computes by simulation 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.

There is a twin application for iOS / Iphone available in its store.

At this moment the application languages are Spanish and English.