| OptimInterim-package | Optimal Two and Three Stage Designs with Time-to-event Endpoints Evaluated at a Pre-specified Time. |
| FixDes | Construct a Single-stage Design for a time-to-event Endpoint Evaluated at a Pre-specifed Time Versus Either a Known Standard Control or a Randomized Comparative Control |
| np.OptimDes | Optimal Two-Stage or Three-Stage Designs with User-specified Combined Sample Size or Study Length |
| OptimDes | Construct Optimal Two-stage or Three-stage Designs with Time-to-event Endpoints Evaluated at a Pre-specified Time |
| OptimDesControl | Set parameters controlling numerical methods for OptimDes and np.OptimDes |
| plot.OptimDes | Plot efficiency of optimal two-stage or three-stage designs as a function of the total sample size or study length |
| print.OptimDes | Print Objects Output By OptimDes |
| SimDes | Simulation Studies for Two-Stage or Three-Stage Designs from function OptimDes |
| TestStage | Statistical test for two-stage or three-stage designs from function OptimDes |
| weibPmatch | Compute the shape or scale parameter for a Weibull distribution so it has a specified event-free rate at a specified time. |
| weibull.plot | Plot Weibull Survival Curves |