Another name for the cause & effect diagram, after its inventor, Kaoru Ishikawa.

Syn: cause-and-effect diagram.

An Ishikawa diagram, also known as a Fishbone diagram or cause and effect diagram, is a diagram that shows the causes of a certain event. It was first used by Kaoru Ishikawa in the 1960s, and is considered one of the seven basic tools of quality management, including the histogram, Pareto chart, check sheet, control chart, cause and effect diagram, flowchart, and scatter diagram. See Quality Management Glossary.