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Methods and formulas for confidence intervals and bounds in Poisson Capability Analysis

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Mean Defective confidence interval

The 95% confidence interval for mean defective is calculated as follows:

Notation

TermDescription
v12 * Dtot
v22 * (Dtot + 1)
DtotSum of all the defectives
NNumber of samples

Mean DPU confidence interval

The 95% confidence interval for mean defects per unit is calculated as follows:

Notation

TermDescription
v12 * Dtot
v22 * (Dtot + 1)
DtotSum of all the defectives
NtotSum of all the sample sizes
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