Cause-and-Effect or Fishbone diagram are also called Ishikawa diagrams
because Kaoru Ishikawa developed them to search the root causes of problem.
The fishbone chart organizes and displays the relationships between different causes for
the effect that is being examined. This chart helps organize the brainstorming process.
The major categories of causes are put on major branches connecting to the backbone and
various sub-causes are attached to the branches.