grabsampling (version 1.0.0)

compare_plans: Probability of detection or non detection versus fraction nonconforming curve

Description

This function allows comparison of different sampling schemes, which can be systematic and random sampling of primary increments or grab sampling of blocks of primary increments. A graphical display of the probability of detection \(P_D\) or probability of non detection \(P_{ND}\) versus fraction nonconforming \(p\) for up to four selected schemes will be produced.

Usage

compare_plans(d, N, plim, type, c1, r1, t1, method1, c2, r2, t2, method2,
                     c3, r3, t3, method3, c4, r4, t4, method4)

Arguments

d

serial correlation of contamination between the primary increments

N

length of the production

plim

the upper limit for graphing the fraction nonconforming or proportion of contaminated increments

type

what type of graph we want to produce such as D or ND. compare_plans produces a graphical display of \(P_D\) or \(P_{ND}\) versus \(p\) depending on the D or ND of type

c1, c2, c3, c4

acceptance numbers

r1, r2, r3, r4

number of primary increments in a grab sample or grab sample size

t1, t2, t3, t4

number of grab samples

method1, method2, method3, method4

what sampling method we have applied such as 'systematic' or 'random' selection methods

Value

Probability of detection or non detection vs limiting fraction curves

Examples

# NOT RUN {
c1 <- 0
c2 <- 0
c3 <- 0
c4 <- 0
r1 <- 1
r2 <- 10
r3 <- 30
r4 <- 75
t1 <- 750
t2 <- 75
t3 <- 25
t4 <- 10
d <- 0.99
N <- 1e9
method1 <- method2 <- method3 <- method4 <- 'systematic'
plim <- 0.10
compare_plans(d, N, plim, type ='D', c1, r1, t1, method1, c2, r2, t2, method2)
compare_plans(d, N, plim, type ='D', c1, r1, t1, method1, c2, r2, t2, method2,
                        c3, r3, t3, method3)
compare_plans(d, N, plim, type ='D', c1, r1, t1, method1, c2, r2, t2, method2,
                        c3, r3, t3, method3, c4, r4, t4, method4)
compare_plans(d, N, plim, type ='ND', c1, r1, t1, method1, c2, r2, t2, method2,
                        c3, r3, t3, method3, c4, r4, t4, method4)

# }