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

Click to display value

You can click any data point or limit line to display its value.

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 more information, see Editing an SPC data record.