root cause analysis (RCA) is a process designed for use in investigating and categorizing the root causes of events with safety, environmental, quality, reliability, and production impacts. Prompt: address the following: Identify and describe a current problem for which you think root cause analysis would be effective. Explain which of the four tools (fishbone diagram, 5 Whys, Pareto chart, or design of experiments) you would use and provide your rationale.