5 Whys

The 5 Whys is an iterative question-asking technique used to explore the cause-and-effect relationships underlying a particular problem.[1] The primary goal of the technique is to determine the root cause of a defect or problem. (The "5" in the name derives from an empirical observation on the number of iterations typically required to resolve the problem.) Example[edit] The vehicle will not start. (the problem)Why? - The battery is dead. The questioning for this example could be taken further to a sixth, seventh, or higher level, but five iterations of asking why is generally sufficient to get to a root cause. It is interesting to note that the last answer points to a process. A key phrase to keep in mind in any 5 Why exercise is "people do not fail, processes do". History[edit] The technique was originally developed by Sakichi Toyoda and was used within the Toyota Motor Corporation during the evolution of its manufacturing methodologies. Techniques[edit] Criticism[edit] See also[edit]

Determine The Root Cause: 5 Whys Asking “Why?” may be a favorite technique of your three year old child in driving you crazy, but it could teach you a valuable Six Sigma quality lesson. The 5 Whys is a technique used in the Analyze phase of the Six Sigma DMAIC (Define, Measure, Analyze, Improve, Control) methodology. By repeatedly asking the question “Why” (five is a good rule of thumb), you can peel away the layers of symptoms which can lead to the root cause of a problem. Benefits of the 5 Whys Help identify the root cause of a problem.Determine the relationship between different root causes of a problem.One of the simplest tools; easy to complete without statistical analysis. When Is 5 Whys Most Useful? When problems involve human factors or interactions.In day-to-day business life; can be used within or without a Six Sigma project. How to Complete the 5 Whys Write down the specific problem. 5 Whys Examples 1. 2. 3. 4. Problem Statement: You are on your way home from work and your car stops in the middle of the road. 1.

5 Whys - Problem Solving Skills from MindTools Quickly Getting to the Root of a Problem How to use the 5 Whys technique, with James Manktelow & Amy Carlson. The 5 Whys is a simple problem-solving technique that helps you to get to the root of a problem quickly. Made popular in the 1970s by the Toyota Production System, the 5 Whys strategy involves looking at any problem and asking: "Why?" Very often, the answer to the first "why" will prompt another "why" and the answer to the second "why" will prompt another and so on; hence the name the 5 Whys strategy. Benefits of the 5 Whys include: It helps you to quickly determine the root cause of a problem.It's simple, and easy to learn and apply. How to Use the Tool When you're looking to solve a problem, start at the end result and work backward (toward the root cause), continually asking: "Why?" Note: The 5 Whys technique is a simple technique that can help you quickly get to the root of a problem. Example In this example, the problem is that your client, Hinson Corp., is unhappy. Key Points

Diagramme de causes et effets Un article de Wikipédia, l'encyclopédie libre. Le Diagramme de causes et effets, ou diagramme d'Ishikawa, ou diagramme en arêtes de poisson ou encore 5M, est un outil développé par Kaoru Ishikawa en 1962[1] et servant dans la gestion de la qualité. Description et fonctions[modifier | modifier le code] Ce diagramme représente de façon graphique les causes aboutissant à un effet. Ce diagramme se structure habituellement autour du concept des 5 M. Chaque branche reçoit d'autres causes ou catégories hiérarchisées selon leur niveau de détail. Le positionnement des causes met en évidence les causes les plus directes en les plaçant les plus proches de l'arête centrale. Variantes[modifier | modifier le code] Les termes « Moyens » ou « Machines » remplacent parfois la catégorie « Matériel ». Une caractéristique peut également être ajoutée dans les univers de production avec un neuvième « M », celui de « Maintenance ». Notes et références[modifier | modifier le code] ↑ (en) Matthew A.

Root Cause Analysis :: Cause Mapping Basics Root Cause Analysis Root cause analysis is an approach for identifying the underlying causes of why an incident occurred so that the most effective solutions can be identified and implemented. It's typically used when something goes badly, but can also be used when something goes well. The Cause Mapping method of Root Cause Analysis In the Cause Mapping method, the word root, in root cause analysis refers to the causes that are beneath the surface. There are three basic steps to the Cause Mapping method: Define the issue by its impact to overall goals Analyze the causes in a visual map Prevent or mitigate any negative impact to the goals by selecting the most effective solutions. For more information about our Cause Mapping workshops click here. What is a Cause Map? A Cause Map provides a visual explanation of why an incident occurred. How to read a Cause Map Start on the left. The questions begin, "Why did this effect happen?" The next question is again, "Why did this effect happen?"

Les 5 pourquoi Le 5 pourquoi en questions De quoi s'agit-il ? Cet outil consiste à se poser la question "Pourquoi ?" Dans quel contexte l'utiliser ? D'une façon générale, il peut s'utiliser dans n'importe quelle démarche de progrès. Pourquoi l'utiliser ? C'est sans doute l'outil le plus simple mais il est d'une efficacité redoutable. Comment l'utiliser ? Contexte de la résolution de problème Cet outil permet de : mieux comprendre les effets d'un problème chercher en profondeur les causes qui expliquent l'apparition d'un problème. Il peut être utilisé pour comprendre les effets d'un problème. Il peut également être utilisé pour comprendre les causes d'un problème. Nous développons ces types de recherche ci-dessous. Rechercher les CAUSES d'un problème Dans le cadre d'une résolution de problème, les 5 pourquoi sera utilisé après avoir réalisé un diagramme de causes à effet . En se posant cinq fois la question du "pourquoi" on mettra en évidence les causes du problème. Exemple : Rechercher les EFFETS d'un problème