The Finish Constraint is a field specific to the CCPM methodology. It represents the desired finish date.
Because scheduling takes place backward from a desired finish date, Sciforma enables Critical Chain projects to be scheduled backward from the end. This does not mean that the last task must be entered first and the entire schedule worked backward. Rather, it means that as tasks are entered and linked and durations specified, the task starting date is computed while keeping the finish date fixed. Tasks can continue to be entered in any order as needed.