C_p {pci}

C_p

Description

C_p = \frac{\text{USL} - \text{LSL}}{L \sigma}

Only vectors of length 1 are recycled.

NA's take precedence over NaN's, e.g. NaN + NA will output NA.

Yields NaN if sigma equals 0.

Usage

C_p(sigma, lsl, usl, dl)

Arguments

sigma

numeric.

lsl

numeric.

usl

numeric.

dl

numeric. L, conventionally set to 6. Must be greater than 0.

Value

double.

References

Montgomery, D. C. (2019). Introduction to statistical quality control (8th ed.). Wiley. ISBN: 978-1-119-39930-8

Examples

set.seed(1L)
data = rnorm(n = 30L, mean = 3., sd = 1.)
C_p(sigma = sd(data), lsl = 0., usl = 6., dl = 6.)
# [1] 1.08211