Originally posted by: SystemAdmin

[Boon said:]

Hi there,

After the model was solved, I looked at the Statistics tab and it said that

Statistic                              Value
Cplex                                  solution(integer optimal, tolerance)
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what is the meaning of "Solution (integer optimal, tolerance)"?

Thanks,

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

[MaryFenelon said:]

This status means that there are still unexplored nodes in the branch and cut tree, but the gap between the best integer solution objective value and the best objective value of all the remaining nodes has fallen beneath either the relative or absolute gap tolerances.  These tolerances are 0.0001 and 0.0 by default and are controlled by the EpGap and EpAGap parameters.  The relative gap is computed by the formula: (best integer - best node ) * objsen / (abs (best integer) + 1e-10).
#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

[MaryFenelon said:]

Should have checked the Parameter Reference Manual before hitting send...

The default value of EpAGap is 1e-6.
#DecisionOptimization
#OPLusingCPLEXOptimizer