This function sets a choice point and then adds the precedence relation rct1.setSuccessor(rct2) on the precedence graph of the resource with the method IlcResourceConstraint::setSuccessor. In case of failure, the precedence relation rct2.setSuccessor(rct1) is added on the precedence graph of the resource.

This goal can be used only when a precedence graph constraint has been posted on the resource.

For more information, see Precedence Graph Constraints.