CuSum and CuSumStatus

The CuSum and CuSumStatus charts are more efficient than Shewhart charts at detecting small shifts in the process mean because the plot represents the moving average of the cumulative differences between the process and its target (centerline).

Cumulative Probability

Cumulative probability charts are used if the defect rate is so small that there will be long runs when the number of defects is zero.

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