A Cumulative Sum Chart (CUMSUM) is a Six Sigma tool used for monitoring process performance and detecting small shifts in the process mean. It plots the cumulative sum of deviations from a target value, helping to identify trends and patterns over time. By focusing on cumulative deviations, CUMSUM charts enhance sensitivity to small but consistent changes that might be missed by traditional control charts. This tool is effective for early detection of process shifts, allowing timely corrective actions. CUMSUM charts support Six Sigma goals by ensuring process stability, improving quality, and minimizing variability, leading to more efficient operations.
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