This document provides an overview of case study research methods. It defines a case study as an in-depth analysis of a particular individual or small group. The document outlines the history, purposes, types (e.g. illustrative, exploratory), and process of conducting case studies including data collection, analysis, and reporting. Key aspects of case studies discussed include collecting qualitative data through methods like interviews and observations; analyzing data for patterns and meaning; and providing rich descriptive reports that contextualize the conclusions. Issues of validity, reliability and generalizability are also addressed.