# reliability

##### Reliability data sets

A set of data for simple reliablility analyses, taken from the book by Meeker and Escobar.

- Keywords
- datasets

##### Details

`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

##### References

Meeker and Escobar, Statistical Methods for Reliability Data, 1998.

##### Examples

```
# NOT RUN {
data(capacitor)
survreg(Surv(time, status) ~ temperature + voltage, capacitor)
# }
```

*Documentation reproduced from package survival, version 3.1-8, License: LGPL (>= 2)*