According to Daniel Pn.

"A case study is a subcategory of research design which investigates problems and offers solutions. Case studies can range from academic research studies to corporate promotional tools trying to sell an idea—their scope is quite vast."

This is very important for graduating students in the philippines. When I was in college, we did two case studies and it not just help us visualize things but also it makes us think outside the box, picture the outcome beyond what we have studied.