Ishikawa diagram

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An Ishikawa diagram


Named after Kaoru Ishikawa, who first developed such diagrams as a management tool.


  • (UK) IPA(key): /ˌɪ.ʃɪˈkɑ.wɑ ˈdaɪ.ə.ɡɹæm/
  • (US) IPA(key): /ˌɪ.ʃiˈkɑ.wɑ ˈdaɪ.ə.ɡɹæm/
  • (file)
  • (file)


Ishikawa diagram (plural Ishikawa diagrams)

  1. A diagram used in quality management to display a detailed list of causes and effects of a problem and thus to decipher the root cause of a problem.
    • 2000, Donald E. Lighter, Douglas C. Fair, Principles and Methods of Quality Management in Health Care, ‎page 59
      The procedure for constructing an Ishikawa diagram relies on brainstorming for stimulating the QI team to think of reasons for the problem.
    • 2001, Judy Hankins, Infusion Therapy in Clinical Practice, page 42:
      The Ishikawa diagram is used extensively in what is termed root cause analysis, meaning the development of hypotheses of why an event occurred.




  • Summers, donna C.S. (2005) Quality management-creating and sustaining Organizational Effectiveness. Upper Saddle River, NJ: Person/prentice hall.