Toys manufacturing data

Description

toys dataframe reports control quality results from a toys factory.

Usage

data(toys)

Format

A data frame with 80 observations on the following 7 variables.

day

day of ispection

weight

weight of the sampled toy

length

length of the sampled toy

defects

defects on sampled toys

sample

sampled toys

rejects

number of toys rejected in ispected toys

inspected

dimension of inspection sample

Details

Fields have different lengths, due coming from different ispection processes.

Source

Industrial data.

References

This dataset can be use to plot different types of control charts. Fields "rejects" and "inspected" may be used to plot np control charts.

Examples

data(toys)
npchart=spc(x=na.omit(toys$rejects), sg=na.omit(toys$inspected), type="np",
    name="Toys rejected")
plot(npchart)