Select What to Calculate, then enter the remaining Parameter Values. Optionally, select a parameter to Fast-Forward, and specify number of and increment per iteration.
Press the Default button to use the original default parameter values, or the Undo button to clear modifications made to current defaults.
Press the Calculate button for results.

2.  Long-term Medical Trial with Time-Dependent Dropout and Event Rates [ref: Wu, Fisher, & Demets]

 

 
What to Calculate: Fast Forward: Specify Parameters:  
 
 
 
 
 
Fast Forward Options: