One of the seven tools of quality
, it shows the relationship
of all factors (causes) that lead to the given situation (effect). It identifies major causes and breaks them down into sub-causes and further sub-divisions (if any). It is usually preceded by cause-and-effect analysis
. Also called fishbone diagram
(because of its resemblance to a fish skeleton) or Ishikawa diagram, after its inventor
Dr. Kaoru Ishikawa
(1915-89) of Tokyo's Mushasi Institute.