Method: SCHEDULE_TOP_DOWN_BACKWARDS
Method: GET_ROOT_DATES_FOR_SCHEDULING
Method: ADD_SCHEDULE_NODE
Method: SCHEDULE_BU_BACKWARD
Method: GET_PARENT_NODE
Method: SCHEDULE_NODES
Method: SCHEDULE_BU_FORWARD
Method: DELETE_SCHEDULE_NODE
Method: SCHEDULE_TOP_DOWN
Method: GET_ROOT_DATES_FOR_SCHED_BACK
Method: DETERMINE_NODE_LEVEL
Method: IDENTIFY_RELATIONSHIPS