In root cause analysis, my focus is on identifying the underlying reasons for issues in product design. I employ methods like the '5 Whys' to systematically drill down into a problem. This involves asking 'why' multiple times until the fundamental cause is uncovered. Additionally, I utilize user feedback, data analysis, and collaborative discussions with cross-functional teams to gain comprehensive insights. This approach ensures that solutions are not just superficial fixes, but address the core of the problem for long-term effectiveness."