Design and Implementation of Computer Aided Monitoring System Based on SPC

Exponentially weighted moving average chart(EWMA) is designed to detect small drift in stationary process.Most traditional statistical process control charts are able to detect large fluctuations.Their ability in discovering small fluctuations is very limited.By tracking the exponentially-weighted moving average,EWMA chart takes the previous drift into consideration and hence can be used to detect small shifts in the process.Provides an entire implementation of EWMA chart and uses it in an online monitoring system that can detect small shifts in the process system.