orings {DAAG}

Challenger O-rings Data

Description

Record of the number and type of O-ring failures prior to the tragic Challenger mission in January, 1986.

Usage

orings

Format

This data frame contains the following columns:

Temperature

O-ring temperature for each test firing or actual launch of the shuttle rocket engine

Erosion

Number of erosion incidents

Blowby

Number of blowby incidents

Total

Total number of incidents

Source

Presidential Commission on the Space Shuttle Challenger Accident, Vol. 1, 1986: 129-131.

References

Tufte, E. R. 1997. Visual Explanations. Graphics Press, Cheshire, Connecticut, U.S.A.

Examples

oldpar <- par(mfrow=c(1,2))
plot(Total~Temperature, data = orings[c(1,2,4,11,13,18),]) # the 
               # observations included in the pre-launch charts
plot(Total~Temperature, data = orings)
par(oldpar)