Enum for selecting which local search heuristics to apply on the root node of a global solve. Use HeuristicSearchTreeSelections to control local search heuristics during the tree search. Default: LargeNeighborhood | SearchUserAddedSolutions (= 17).
The local search heuristics will benefit from having an existing incumbent solution, but it is not required. An initial solution can also be provided by the user through either XPRSloadmipsol or XPRSreadbinsol. Refers to: http://www.maths.ed.ac.uk/hall/Xpress/FICO_Docs/optimizer/HTML/HEURSEARCHROOTSELECT.html
[Flags] public enum HeuristicSearchRootSelections
Enable all strategies. Not recommended.
Local search with a neighborhood set up through the combination of multiple integer solutions.
Local search with a large neighborhood. Potentially slow but is good for finding solutions that differs significantly from the incumbent.
Local search on solutions added by XPRSaddmipsol. If this bit is disabled, a partial or an infeasible solution loaded with XPRSaddmipsol will be rejected without a search being performed.
Local search with a small neighborhood centered around a node LP solution.
Local search with a small neighborhood centered around an integer solution. This heuristic will often provide smaller, incremental improvements to an incumbent solution.