Process / pipelineStatistical process control
CUSUM Control Chart
The cumulative sum (CUSUM) control chart, introduced by E. S. Page in 1954, monitors a process by accumulating the deviations of observations from a target value rather than judging each point in isolation. Because small persistent shifts add up over time, the running sum makes them visible far sooner than a Shewhart chart, making CUSUM the tool of choice for detecting small, sustained changes in the process mean.
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Sources
- Page, E. S. (1954). Continuous inspection schemes. Biometrika, 41(1/2), 100–115. DOI: 10.1093/biomet/41.1-2.100 ↗
- Montgomery, D. C. (2009). Introduction to Statistical Quality Control (6th ed.). John Wiley & Sons. ISBN: 978-0-470-16992-6