Applying Five Why Technique for Root Cause Analysis Dr. Nancy Agnes, Head, Technical Operations, Tutorsindia info@ tutorsindia.com
II. THE ORIGINS OF FIVE WHYS For Want of a Nail “For want of a nail the shoe is lost, For want of a shoe the horse is lost, For want of a horse the rider is lost, For want of a rider the battle is lost, For want of a battle the kingdom is lost, And all for the want of a horseshoe nail”. - George Herbert I. INTRODUCTION Any organization or process or team can be confronted with unanticipated challenges. Nonetheless, the challenges might just a symptom to an underlying issue. Prompt resolution of the challenge could prove to be the most feasible solution, but there is no guarantee that it might safeguard the organization or team or process from being confronted with recurring errors. Considering the scenario, it is important for the organization or the team in question to identify the root cause and tackle it in an appropriate manner. While there are several tools that can help an organization to conduct a root cause analysis, the ‘Five Whys’ technique is considered as one of the most effective tools in the repertoire of lean management. Teams are known to come face-to-face with roadblocks during their dayto-day work. Nonetheless, the use of five whys will enable the team to identify the root cause of any problem and thereby safeguard the process from such problems occurring in future, which might result in failure This blog aims to acclimatize you with the Five Whys technique for root cause analysis and inform you about how it can be effectively utilized to understand why a particular problem keeps occurring within your process. But first, it is important to trace the history of the Five Whys.
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Sakichi Toyoda was the person who has been attributed with developing the Five Whys. The idea behind developing the Five Whys was to spot the root cause to some problems that were being encountered at the manufacturing unit at Toyota. Over the years, the Five Why technique has been widely accepted and adapted by social scientists as well as educators to facilitate them to develop problem definitions and pertinent interventions [1]. The application of Five whys is quite simple wherein it comprises of converting a problem into a ‘why’ question. Five answers are brainstormed by participants on the basis of their experience and knowledge. Out of all the suggestions, the answer that is most feasible is chosen and converted into yet another ‘why’ question. This cycle is repeated five times. Participants are motivated to hypothesize and theorize on the problems in such a manner that it avoids assumptions that are unsubstantiated, sustaining relation to their lived experiences. Therefore, using the five whys technique requires careful facilitation on the part of individuals who are skilled in the practice of critical questioning and reflection and those who are well-versed in developing contexts which people are comfortable sharing [2]. III. APPLYING THE FIVE WHYS At the time of applying the five whys technique, you might want to reach the essence of the problem and then try to find a solution. Sometimes, the five whys would reveal an unexpected source to the problem. More often than not, issues that are deemed as problems which would be technical nature would eventually reveal themselves to be process or human problems. That makes it necessary to apply the five whys to find and eliminate the root cause to restrict the scope for the same problem from recurring [3].
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