Root cause analysis (RCA) is a practical problem-solving tool. Once a root cause found we can concentrate on the solution that is related to the found root cause. A definition of a Root Cause is extremely important for the problem-solving process. We should clearly define and understand what a Root Cause is. Otherwise, RCA becomes completely useless, besides a problem will not be solved. What is Root Cause? Everyone remembers a traditional definition:  ROOT CAUSE IS A FUNDAMENTAL REASON FOR THE OCCURRENCE OF THE PROBLEM. This definition is very popular and clear, but we have to take into account the…