p chart: proportion of nonconforming units

p chart: proportion of nonconforming units

Usage

edetect_p(x, n, center = NULL, phase1 = NULL, ...)

Arguments

x

Counts of nonconforming units per subgroup.

n

Subgroup sizes (one per subgroup or a single value).

center

Pre-change proportion; omit to estimate it from phase1.

phase1

Optional Phase I data frame with columns x and n.

...

Passed to edetect_design() (arl, direction, type, evalue, delta, weights).

Value

An edetect_chart.

Examples

chart <- edetect_p(x = c(1, 0, 2, 1, 3, 4, 5, 6), n = 100, center = 0.01, arl = 100)
#> Warning: Alarm at t = 7; 1 later observation was not consumed.
edetect_alarm(chart)
#> # A tibble: 1 × 6
#>   alarm alarm_time evidence threshold change_estimate n_observed
#>   <lgl>      <int>    <dbl>     <dbl>           <int>      <int>
#> 1 TRUE           7     197.       100               5          7