Failure directed search
Type : Selection
Range : The settings listed below
Default : On
This option controls usage of failure-directed search. Possible values are:
Off
On
Failure-directed search assumes that there is no (better) solution or that such a solution is very hard to find. Therefore it focuses on systematic exploration of the search space, first eliminating assignments that are most likely to fail. Failure-directed search is used only for scheduling problems (i.e. models containing activities) and only when the option Search Type is set to ‘Restart’ or ‘Automatic’.
When this option is switched on then CP Optimizer starts failure-directed search when other search strategies are (no longer) successful and when the memory necessary for the search does not exceed the value set by the option Failure Directed Search Memory Limit .
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