Requirements engineering knowledge share and retrieve based on situations similarity

Project situation is one critical key foundation of requirements engineering (RE) knowledge share and reuse. RE knowledge can be shared and reused under similar project situation. A new knowledge retrieve technology based on project situation similarity is proposed in this paper. Firstly, the tree models or hierarchy models of RE knowledge situation are presented. Secondly, three situation match schemes are summarized and analyzed with reference to the tree matching, including tree inset, tree inclusion and tree intersection. Further, a quick tree matching algorithm is provided upon these three schemes. Through algorithm application, the results show that this solution is feasible and effective for the knowledge retrieve with high recall and precision.