Case - the enclosing frame around a door or window opening; "the casings experienced rotted away and had to get replaced" The term cumulative case study means a set of earlier scientific tests, which can be gathered from different assets like the web, principle papers, other case scientific tests, etc. https://lukaswstnm.bloguetechno.com/top-latest-five-hbs-case-study-solution-urban-news-71562552