As a number of software developing, FDD is a method that construct a system directly, its process may highly iterate, in every step it emphasis quality, constantly deliver fulfill and feasible result.

• 作为软件开发的一种，FDD是构造系统的一个直接途径，其过程可以高度迭代，每一步都强调质量，不断交付完成的，切实可行的结果。