Quality Management Tools: Ishikawa Diagrams or Fishbone Diagrams
Cause and Effect diagram are a graphical method for finding the most likely causes for an undesired effect. The Cause and Effect diagram also known as the fishbone diagram or Ishikawa diagram after its creator Kaoru Ishikawa is used to systematically list all the different causes that can be attributed to a specific problem (or effect). A cause and effect diagram can help identify the reasons why a process goes out of control. The Ishikawa diagram is one of the seven basic tools of quality control, which include the histogram, Pareto chart, check sheet, control chart, cause-and-effect diagram, flowchart, and scatter diagram. The purpose of this diagram is to arrive at a few key sources that contribute most significantly to the problem being examined. These sources are then targeted for improvement. The diagram also illustrates the relationships among the wide variety of possible contributors to the effect. The basic concept Continue reading