To fix root causes in tech, first use structured analysis like the “5 Whys” or Fishbone Diagram to drill past symptoms to the underlying system, process, or design failure. Then, implement a corrective action plan that addresses this core flaw—such as updating code architecture, changing deployment procedures, or improving requirements gathering—not just applying a temporary patch. Finally, validate the fix through testing and monitoring, and update relevant documentation, runbooks, and training to prevent recurrence and institutionalize the learning.