Question: is the process in control? U Chart Diagnostic for Number of clients served Poisson Probability Plot Ratio of observed variation to expected variation = 64.4%

is the process in control?

U Chart Diagnostic for Number of clients served Poisson Probability Plot Ratio of observed variation to expected variation = 64.4% 95% Upper Limit for ratio if process mean is constant = 155.7% Using a U chart should not result in an elevated false alarm rate

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