Definition
A case study is an in-depth examination of a single individual, group, organization, event, or community to explore the dynamics and complexities of real-life situations.

Introduction
While surveys look at thousands of people superficially, the case study looks closely at one situation to uncover causes, processes, and patterns that numbers alone cannot reveal. It is the microscope of social and business research—bringing clarity to intricate realities through detail rather than volume.

Explanation
The strength of the case study lies in its contextual richness. The researcher collects multiple kinds of evidence—interviews, documents, observations, and sometimes quantitative data—to build a comprehensive picture. The goal is understanding, not mere measurement.
Case studies may be exploratory (to identify variables for future study), descriptive (to document phenomena), or explanatory (to analyze causes).

Suppose a company suddenly recovers from bankruptcy; rather than surveying the whole industry, the researcher immerses in that single firm—its leadership decisions, culture, stakeholder relations—to understand how recovery occurred. The lessons often have wider relevance despite being drawn from one instance.

However, case studies face criticism for subjectivity and limited generalization. To counter this, researchers ensure transparency in data collection, triangulate multiple sources, and relate findings to theory.

Key Takeaways
Case studies trade statistical generality for deep contextual understanding. They are indispensable for exploring “how” and “why” questions in real settings.

Real-World Case
Harvard Business School popularized the case-study approach, using detailed analyses of firms like Apple and Starbucks to teach management decision-making. Each case reconstructs real dilemmas, blending data and narrative to generate applied learning.
Reference: https://www.hbs.edu