In some cases, especially when a solution seems to be optimal, one would like to keep the other solutions generated which seems equivalent in order to have the possibility to choose, rather than having a single representative of a "plateau" in the solution space. It could help also to compare solutions to identify further properties to exploit in order to refine the operators.
In some cases, especially when a solution seems to be optimal, one would like to keep the other solutions generated which seems equivalent in order to have the possibility to choose, rather than having a single representative of a "plateau" in the solution space. It could help also to compare solutions to identify further properties to exploit in order to refine the operators.