The dimensions of “When” and “How” explore the CSTinterface
from the perspective of research evolution. The
immediacy rate of article citation in PS was high (up to
73.7%). However, most of those citations appeared as a brief
summary within the sections of introduction or related work.
Very few topics (e.g., testing scalability) evolved in the manner of proposing new ideas to address challenges of previous ideas. These results revealed that the CST-interface
was still not well-formulated in the research community.