03-30-2012 12:11 AM
I want to create control chart for data set contain study id, group by,milestone date, and duration between milestone
process a study. As you can see from the data below, several studies get released on the same day. As a result, several
observations could fall on the same point in the plot when plotting the data.
In CONTROL CHART Required:
on x-axis: milestone date
on y-axis: duration between milestone
point label: Study id
group by different set of control limit (UCL, MEAN, LCL)
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How to create control chart for different set of control limit by groupby
required polt with symol dot joining by line with phase reference and phase break
Size of observation range from 0 to max
Which method to choose? is this proc shewhart or other?
I am using SAS 9.2
I tried Proc Shewhart irchart showing error like unique subgroup, so on
Any help would be gretly appreciated.