Autor: David H. Olwell

All the data was out there to warn us of this impending attack, why didn’t we see it?’ This was a frequently asked question in the weeks and months after the terrorist attacks on the World Trade Cent …

Cumulative sum (CUSUM) control charting is a valuable tool for detecting and diagnosing persistent shifts in series of readings. It is used in traditional statistical process control (SPC) settings s …