A control chart begins with a time series graph. A central line (X) is added as a visual reference for detecting shifts or trends – this is also referred to as the process location.

Process inspection schemes using control charts with warning lines are considered and the properties for some schemes based on the observations from the last few samples are evaluated. Tables of ...

Last line of defense: artillery chart operations outdated, but vital By Sgt. Christopher M. Gaylord, 5th Mobile Public Affairs Detachment May 26, 2011 ...

Traditional statistical process control charts assume that observations are independent and normally distributed about some mean. We investigate the robustness of traditional charts to data ...

Some chart patterns provide such early entries. Seek out such entry points by drawing a downward-sloping trend line across the high points in a base.

In Microsoft Excel, to draw attention to a specific marker in a line chart, drop in a thin line, think of it as a marker.