Ishikawa Diagram

Ishikawa diagrams (also called fishbone diagrams, herringbone diagrams, cause-and-effect diagrams, or Fishikawa) are causal diagrams created by Kaoru Ishikawa that show the potential causes of a specific event.

Common uses of the Ishikawa diagram are product design and quality defect prevention to identify potential factors causing an overall effect. Each cause or reason for imperfection is a source of variation. Causes are usually grouped into major categories to identify and classify these sources of variation.

Advantages

Highly visual brainstorming tool which can spark further examples of root causes
Quickly identify if the root cause is found multiple times in the same or different causal tree
Allows one to see all causes simultaneously
Good visualization for presenting issues to stakeholders

Disadvantages

Complex defects might yield a lot of causes which might become visually cluttering
Interrelationships between causes are not easily identifiable

For more information refer to: https://en.wikipedia.org/wiki/Ishikawa_diagram