The relationship and key question are analyzed among indexical process planning, derived process planning and generative process planning in chapter 4, and then the method is given.

• 第四章详细分析了检索式工艺设计、派生式工艺设计和创成式工艺设计方法之间的关系和实现的关键问题，针对这些问题给出了相应的解决方案。