In this approach , according to geometric precedence and tolerance precedence among features , the reasonable machining operations of features with multiple machining operations are determined , and the conflicts between geometric precedence and tolerance precedence of features are disposed . the approach can generate the process plan by which the part can be machined to satisfy the required tolerances , and the approach also has high efficiency 在简化加工工艺规划中，根据公差要求和加工顺序，有效地处理多刀具访问方向的特征的加工方法优选和确定问题，有效地处理顺序约束冲突问题，从而压缩了工艺规划过程的搜索空间，浙江人学博i ：学位论义一提高规划的效率。
