Long description

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 ...

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