C. Specific Requirement Engineering Techniques for Expert System
There are a lot of RE techniques can be used for ES development in different tasks in RE process. In this paper, we have identified all the specific techniques out of the RE technique library proposed in the research done by Jiang et al. [2]. Meanwhile, the selecting factors will be based on the factor listed by Kheirkhah and Dareman [1]. The justification of the selected techniques is listed in Table 1.