EWMA Charts

The EWMA (Exponentially Weighted Moving Average) Chart uses a weight value to create a moving average.

An EWMA Chart provides a better representation of batch processes by letting you examine the influence of prior data points on a current sample. It allows for smoothing of data, normalizing the effects than an out-of-control spike will have on a data set.

Chart settings and options

• See Chart Settings options for information on changing the display elements of this chart.

• Using chart right-click menus

• Choosing Limits to display

Brushing data

You can use a simple technique called "data brushing" to select any number of consecutive data points on a chart. Then, select from options that allow you to focus on just that data or to exclude it from the retrieval.

• See Brushing chart data for more information.

Showing the data behind the chart

• See Showing the data behind the chart

One-click to display value feature

• Click anywhere on a data point to display its value as shown in Fig. 1.

• Click on any limit line to display the value for that limit as shown in Fig. 2.

Fig. 1Fig. 2

Editing data, data notes, and more on a chart

Depending on how your GainSeeker is configured, certain access rights may be required to use this function.

For information on editing data, data notes, and more, see:

• Editing SPC data and the traceability

• Editing the note, corrective action, anchor point, or bypass