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VARSELECTION

Description
Branch and Bound: This determines the formula used to calculate the estimate of each integer variable, and thus which integer variable is selected to be branched on at a given node. The variable selected to be branched on is the one with the minimum estimate. The variable estimates are also combined to calculate the overall estimate of the node, which, depending on the BACKTRACK setting, may be used to choose between outstanding nodes.
Type
Integer
Values
-1 
Determined automatically.
1 
The minimum of the 'up' and 'down' pseudo costs.
2 
The 'up' pseudo cost plus the 'down' pseudo cost.
3 
The maximum of the 'up' and 'down' pseudo costs, plus twice the minimum of the 'up' and 'down' pseudo costs.
4 
The maximum of the 'up' and 'down' pseudo costs.
5 
The 'down' pseudo cost.
6 
The 'up' pseudo cost.
Default value
-1
Affects routines
XPRSglobal (GLOBAL).

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