Ishikawa Diagram

The Ishikawa diagram – also known as the fishbone diagram – is a tool for systematically identifying the causes of a problem (effect). The bones divide the causes into categories. Its one of the seven most important quality tools. It was developed by the Japanese scientist Kaoru Ishikawa.

Objective:
  • Method for error analysis
  • Illustrate relationships
  • Categorize causes
  • Make causes measurable
  • Reducing error costs
Tips:
  • All core causes should be physically measurable.
  • Avoid dead-end arguments (e.g., lack of time, no money, management decision).
  • Persistently ask for core causes (5 Whys).
Platzhalter

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