What Is a Fishbone Diagram? Key Terms Fishbone Diagram A visual root cause analysis tool — also called an Ishikawa diagram (after its creator, Kaoru Ishikawa, 1968) or Cause and Effect diagram — that maps the potential causes of a specific problem or defect in a structured, categorised format. The diagram’s appearance resembles a fish … Continue reading Fishbone Diagram (Ishikawa): A Complete Guide to Cause and Effect Analysis