Читать книгу Root Cause Failure Analysis - Trinath Sahoo - Страница 60

One of the more popular tools used in root cause analysis is the fishbone diagram, otherwise known as the Ishikawa diagram, named after Kaoru Ishikawa, who developed it in the 1960s. A fishbone diagram is perhaps the easiest tool in the family of cause and effect diagrams that engineers and scientists use in unearthing factors that lead to an undesirable outcome.

A fishbone diagram is a visual way to look at cause and effect. It is a more structured approach than some other tools available for brainstorming causes of a problem (e.g., the Five Whys tool). The problem or effect is displayed at the head or mouth of the fish. Possible contributing causes are listed on the smaller “bones” under various cause categories. A fishbone diagram can be helpful in identifying possible causes for a problem that might not otherwise be considered by directing the team to look at the categories and think of alternative causes. Include team members who have personal knowledge of the processes and systems involved in the problem or event to be investigated.