arl: ARL for Lucas's Cusum Chart for Attribute Data

In IAcsSPCR: Data and Functions for "An Intro. to Accept. Samp. & SPC/R"

Description

Calculates ARL for Lucas's Cusum Chart for Attribute Data

Usage

arl(h=2,k=2,lambda=1,shift=.5)

Arguments

h	input - this is the decision limit. It should be an even number, so that h/2 for the FIR feature will also be an integer.
k	input - this is the reference value. It should be calculated as (mu_d-mu_a)/ln(mu_d-mu_a), where mu_a is the in-control Poisson mean and mu_d mean to detect. k should be rounded to an integer.
lambda	input - this is the in-control Poisson mean.
shift	input - this is the number of standard deviation shift from the in-control mean to the mean to detect , i.e., lambda+shift*sqrt(lambda)=mu_d.

Value

returned list containing the ARL and the ARL with FIR.

Author(s)

John Lawson

References

Lucas, J.M.(1985) "Counted data cusums", Technometrics, Vol. 27, No. 2, pp129-143.

Examples

library(IAcsSPCR)
arl(h=6,k=2,lambda=1.88,shift=0)
arl(h=6,k=2,lambda=1.88,shift=.9627)
{
  }

Example output

Registered S3 method overwritten by 'DoE.base':
  method           from       
  factorize.factor conf.design
[[1]]
[1] "ARL="

[[2]]
[1] 37.2

[[3]]
[1] " ARL(FIR)="

[[4]]
[1] 29.19

[[5]]
[1] " Valid if h is a even integer "

[[1]]
[1] "ARL="

[[2]]
[1] 5.49

[[3]]
[1] " ARL(FIR)="

[[4]]
[1] 3.33

[[5]]
[1] " Valid if h is a even integer "

NULL

IAcsSPCR documentation built on Nov. 23, 2020, 5:07 p.m.