MPBS and IBS comparison for RandomSet instances.

Time(.Second column shows mean improvement of solutions obtained by MPBS with respect to the ones obtained by IBS for instances in RandomSet with different alphabet sizes (). Third column shows the percentage of MPBS runs that were able to reach a solution better than or equal to the one provided by IBS. Fourth column shows statistical values (mean () and standard deviation ()) for the time (in seconds) needed by IBS to produce its solution. Fifth column shows statistical values (mean and standard deviation) for the time (in seconds) needed by MPBS to produce a solution better than or equal to the one provided by IBS.