The horizontal axis is labelled Time with no increments identified. The vertical axis is labelled MADs and identified increments are, ascending, negative, zero, positive. A horizontal line extends the length of the graph from each of these three incremental points, and a data line is plotted out.
The horizontal line extending from the negative sign on the vertical axis is labelled Lower Control Limit.
The horizontal line extending from the positive sign on the vertical axis is labelled Upper Control Limit.
A key titled Tracking Signals identifies the area between the lower Control limit and upper control limit as the acceptable range.
The data line begins at zero MADs on the vertical axis. It moves from left to right in a gentle ...