Interpret a Legacy One-Sided CUSUM Chart

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Quality and Process Methods > Legacy Control Charts > V-Mask CUSUM Chart Reports > Interpret a Legacy One-Sided CUSUM Chart

Publication date: 06/21/2023

Interpret a Legacy One-Sided CUSUM Chart

Use a one-sided CUSUM chart to identify data approaching or exceeding the side of interest.

Figure 14.10 Example of a One-Sided CUSUM Chart

Example of a One-Sided CUSUM Chart

The decision interval or horizontal line is set at the H value that you entered in the launch window. In this example, it is 0.25. Any values exceeding the decision interval of 0.25 indicate a shift or out-of-control condition. In this example, observation 4 appears to be where a shift occurred. Also note that no V-mask appears for one-sided CUSUM charts.

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