Quality and Reliability Methods - SAS

376 Reliability and Survival Analysis II Chapter 20
Launching the Fit Parametric Survival Platform
Figure 20.4 Estimate Time Quantile Dialog
Click Go to produce the quantile estimates and a confidence interval.
Figure 20.5 Estimates of Time Quantile
This estimates that 90% of the jobs will be done by 571 seconds of execution time under a system load of 5.
Launching the Fit Parametric Survival Platform
As an example to illustrate the components of this platform, use the VA Lung Cancer.jmp sample data table.
See Kalbfleisch and Prentice (1980). The response, Time, is the survival time in days of a group of lung
cancer patients. The regressors are age in years (Age) and time in months from diagnosis to entry into the
trial (Diag Time). Censor = 1 indicates censored values.
The Fit Parametric Survival survival command launches the Fit Model dialog shown in Figure 20.6. It is
specialized for survival analysis with buttons that label the time (Time to Event) and censor (Censor)
variables. The fitting personality shows as Parametric Survival. An additional popup menu lets you choose
the type of survival distribution (Weibull, Lognormal, Exponential, Fréchet, and Loglogistic) that you
think is appropriate for your data. You can choose the All Distributions option to fit all the distributions
and compare the fits. When the All Distributions option is used, a summary appears at the top of the
platform report giving fit statistics for all the distributions.