Branch directions can be used with the methods Cplex.SetDirection and Cplex.SetDirections to select the child node to evaluate first after branching on a specific variable. There are three settings:

• Up: process the child where the lower bound of the variable has been tightened first.
• Down: process the child where the upper bound of the variable has been tightened first.
• Global: process the child first that the MIP optimizer would have ordinarily chosen.