XCHART Statement: CUSUM Procedure
- Overview
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Getting Started
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Syntax
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Details
Basic Notation for Cusum Charts Formulas for Cumulative Sums Defining the Decision Interval for a One-Sided Cusum Scheme Defining the V-Mask for a Two-Sided Cusum Scheme Designing a Cusum Scheme Cusum Charts Compared with Shewhart Charts Methods for Estimating the Standard Deviation Output Data Sets ODS Tables ODS Graphics Input Data Sets Missing Values
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Examples
Defining the Decision Interval for a One-Sided Cusum Scheme
The height of the decision interval is 
, expressed as a multiple of the standard error of the subgroup mean. You can specify with the H= option in the XCHART statement or with the variable _H_ in a LIMITS= data set. The decision interval is displayed as a horizontal line on the cusum chart, as illustrated in Figure 6.13.
Figure 6.13
Decision Interval
if the cusum 
plotted at time