| reliability {survival} | R Documentation |
A set of data for simple reliablility analyses, taken from the book by Meeker and Escobar.
capacitor:
Data from a factorial experiment on the life of glass capacitors as a
function of voltage and operating temperature. There were 8 capacitors
at each combination of temperature and voltage.
Testing at each combination was terminated after the fourth failure.
temperature: temperature in degrees celcius
voltage: applied voltage
time: time to failure
status: 1=failed, 0=censored
cracks: Data on the time until the development of cracks
in a set of 167 identical turbine parts.
The parts were inspected at 8 selected times.
day: time of inspection
fail: number of fans found to have cracks, at this inspection
Data set genfan: Time to failure of 70 diesel engine fans.
hours: hours of service
status: 1=failure, 0=censored
Data set ifluid:
A data frame with two variables describing the time to electrical
breakdown of an insulating fluid.
time: hours to breakdown
voltage: test voltage in kV
Data set imotor: Breakdown of motor insulation as a function of
temperature.
temp: temperature of the test
time: time to failure or censoring
status: 0=censored, 1=failed
Data set turbine:
Each of 432 turbine wheels was inspected
once to determine whether a crack had developed in the wheel or not.
hours: time of inspection (100s of hours)
inspected: number that were inspected
failed: number that failed
Data set valveSeat:
Time to replacement of valve seats for 41 diesel engines. More than
one seat may be replaced at a particular service, leading to duplicate
times in the data set. The final inspection time for each engine will
have status=0.
id: engine identifier
time: time of the inspection, in days
status: 1=replacement occured, 0= not
Meeker and Escobar, Statistical Methods for Reliability Data, 1998.
data(capacitor) survreg(Surv(time, status) ~ temperature + voltage, capacitor)