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Solder defects on printed circuit boards

Source: R/data.R
pcb_solder.Rd

A synthetic Poisson dataset: number of defective solder joints on each of 50 inspected printed circuit boards. The mean is 6, ideal for either the 3-sigma c chart or its more honest cousin with exact Poisson limits.

Usage

pcb_solder

Format

A tibble with 50 rows and 2 columns:

board

Integer board identifier.

defects

Integer count of defective joints.

Source

Synthetic. See data-raw/build_all.R.

See also

shewhart_c().

Examples

fit       <- shewhart_c(pcb_solder, defects = defects, index = board)
#> Warning: c_bar = 5.76 is small; the normal approximation is poor.
#> ℹ Consider `limits = "poisson"` for exact limits.
fit_exact <- shewhart_c(pcb_solder, defects = defects, index = board,
                        limits = "poisson")