Large Number of Unhelpful Cuts

Large Number of Unhelpful Cuts

While the cuts added by ILOG CPLEX reduce runtime for most problems, on occasion they can have the opposite effect. If you notice, for example, that ILOG CPLEX adds a large number of cuts at the root, but the objective value does not change significantly, then you may want to experiment with turning off cuts.

In the Interactive Optimizer, you can turn cuts off selectively (set mip cuts covers -1) or all at once (set mip cuts all -1).
In the Component Libraries, set the parameters that control classes of cuts (Table 5.4).

Copyright © 2001 ILOG
http://www.ilog.com

Previous Page: Trouble Finding More than One Feasible Solution

Return to Top

Next Page: Lack of Movement in the Best Node