This application computes the ARL for the Xbar, S and Xbar-S control chart for different mean and sigma shifts. It shows where to place the control limits for different in-control ARLs.

In addition it plots the ARL curve for mean or sigma shifts.

Moreover, it is possible to compare two sampling plans (sample size and frequency of sampling) in order to find the most efficient one to detect a process shift (smaller ATS). And it is possible to optimize the sample size for a given shift to minimize the ATS.

Available languages are at the moment Spanish and English.

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