Article: Get at the core
Great article by Devin McElroy from Quality Progress magazine about the root causes of defects
'Human error' is not a root cause because it doesn’t identify the real problem causing the error to occur.
Employee retraining often is implemented as a corrective action, but because human error isn’t the true root cause, retraining doesn’t prevent the defect from recurring.
Asking 'why did the human err?' will help identify the true root cause of a problem.