Decision trees may be created and executed to manage calls in an interactive voice response (IVR) system. Users may be provided with one or more user interfaces to design, create, and modify decision trees. User may add and edit the rules, logic, and instructions of the decision tree, as well as additional information such as labels, headers, comments, and formatting. One or more decision tree files may be created including the rules, logic, and instructions of the decision tree, which are compatible with an execution engine. One or more decision tree development files also may be created including additional information to be used by a decision tree development application to provide the development environment.