To provide Perception into an issue, and particularly to help refine a concept. Theory is of Principal value; the case is chosen for its prospective contribution to idea. In line with Yin, theoretical case studies must be various. According to Stake, idea might be formulated from only one case. 4 https://brooksxmtqf.timeblog.net/75688082/5-simple-statements-about-case-study-analysis-explained