The following table lists the computational effects of the various enforcement levels available in the program. (The CPU times are based on implementation of the program on a Pentium III processor, and listed in seconds.)

The three less-intensive enforcement levels have exactly the same effects on the number of fails, choice points, and CPU time. As the enforcement level increases to IloMediumHigh and then IloHigh, the CPU time increases, as the amount of effort spent by the scheduler after each choice point at enforcing the constraints increases. Note, however, that the number of choice points and the number of fails substantially decrease at higher enforcement levels. While this decrease does not result in lower CPU time in this particular problem, it is sometimes the case that higher levels of enforcement do lead to significantly less CPU time. You should experiment with different levels in solving your own scheduling problems.

From the perspective of the extracted Scheduler classes: