The Cause and Effect (a.k.a. Fishbone) Diagram

When utilizing a team approach to problem solving, there are often many opinions as to the problem’s root cause. One way to capture these different ideas and stimulate the team’s brainstorming on root causes is the cause and effect diagram, commonly called a fishbone. The fishbone will help to visually display the many potential causes…


Categories of Legitimate Reservation Focuses Fishbone

The fishbone diagram is the most commonly used cause-and-effect analysis tool in Six Sigma. Cause-and-effect analysis is one of the key tasks in any Six Sigma DMAIC project because half of the game is won when the correct root causes of the problem (the Y) are found. However, poor use of the fishbone diagram is…

Combining SIPOC with the Cause-and-Effect Diagram

Six Sigma practitioners strive to find the root causes of defects fast and accurately. One of the tools that provides a good initial view of the process Six Sigma is being used to optimize is SIPOC (supplier, input, process, output, customer). This tool is especially helpful when the improvement project is aimed at a process…