MIP Strategy
Type : Selection
Range : The settings listed below
Default : Proprietary method
This option can be used to select one of the nine branch and bound strategies supported by XA. Each XA branch and bound strategy has three variations that can be set by means of the options MIP Strategy Branching Priorities , MIP Strategy Estimate Integer Solution and MIP Strategy Split Node List . In some cases these variations reduce the solution time but may not yield an optimal integer solution. If you are interested in obtaining a fast and ‘good’ integer solution (which may not be optimal) try these variations. Possible values of this option are:
Proprietary method
Minimum change in objective function
Priority based on column order
Column closest to its integer bound
(Not used)
Column always branches up
Column always branches down
Column farthest from its integer bound
Column randomly selected
Apparent smoothest sides in the polytope
The setting “Column randomly selected” is useful when solving very large problems.
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