This document provides an introduction to design thinking. It discusses design thinking as a human-centric process that involves empathizing with customers to understand their needs, generating and refining ideas, and iterating based on customer feedback. The document outlines the main stages of design thinking as empathize, define, ideate, prototype, and test. It emphasizes the importance of qualitative research methods like interviews and observation to gain insights into customers. The document also discusses how to plan research effectively and highlights best practices for conducting interviews and focus groups.