Case study method was, at first, introduced in Harvard School of Law. In 1920s, Harvard Business School professors decided to introduce innovative teaching method. As a result, they introduced case method in teaching-learning process. They used case method in MBA at first. They introduced case method because it force the students to analyse the situation and find solution as a manager, CEO, and board member. It is expected from the students that they assess the facts, make analysis, evaluate the alternatives and take decision individually and collectively. Case method of teaching forces to the students for depth preparation, full participation, expose their thinking from multiple view points, analyse the situation and take decisions.