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EWMACHART Statement |

You can use options in the EWMACHART statement to

- specify the weight assigned to the most recent subgroup mean in the computation of the EWMAs
- compute control limits from the data based on a multiple of the standard error of the plotted EWMAs or as probability limits
- tabulate the EWMAs, subgroup sample sizes, subgroup means, subgroup standard deviations, control limits, and other information
- save control limit parameters in an output data set
- save the EWMAs, subgroup sample sizes, subgroup means, and subgroup standard deviations in an output data set
- read control limit parameters from an input data set
- specify one of several methods for estimating the process standard deviation
- specify a known (standard) process mean and standard deviation for computing control limits
- display a secondary chart that plots a time trend removed from the data
- add block legends and symbol markers to reveal stratification in process data
- superimpose stars at points to represent related multivariate factors
- clip extreme points to make the chart more readable
- display vertical and horizontal reference lines
- control axis values and labels
- control layout and appearance of the chart

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