GB/T 17989.4-2020
ActiveControl charts—Part 4: Cumulative sum charts
控制图 第4部分：累积和控制图
Application Summary AI generated
This standard specifies the statistical methods and procedures for constructing and interpreting cumulative sum (CUSUM) control charts. It is applied in manufacturing and service industries for detecting small, persistent shifts in process parameters, such as mean or variability, by cumulatively summing deviations from a target value. The standard is used in quality control and process monitoring contexts where early detection of process changes is critical for maintaining product or service consistency.
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