If, in practice, decisions have to be taken online with no recall under incomplete knowledge, a decision tree should be paralleled by a probability model as a best choice model or online selection model algorithm.
如果在实际中，决策不得不在没有完备知识的情况下被在线采用，一个决策树应该平行概率模型作为最佳的选择模型或在线选择模型算法。