StatTools : CUSUM Program for
Exponentially Distributed (Inverse Poisson) Values

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Related Links:
CUSUM Charts Explained Page
MacroPlot Help Page

Program References
Please note :The program is accurate within the following constraints
  • β = β1 / β0 is within the range of 0.02 to 0.99 and from 1.05 to 50.0
  • arl when in control is within the range of 20 (probability of false positive=0.05 or 5%) to 1000 (probability of false positive=0.001 or 0.1%)
Click button to run program using example data,
or replace example data with real data and click button to tun.
Measurement in control (β0)
Measurement when out of control (β1)
Averaged Run Length (ARL)
Starting value for CUSUM as proportion of h

MacroPlot Code