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Understanding Fishbone Diagram: Creation, Uses & Benefits

Fishbone Diagram, also known as Ishikawa Diagram, is a visual tool for identifying causes of problems within organizations. This overview covers its uses, benefits, creation steps, and examples to improve problem-solving processes effectively.

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Understanding Fishbone Diagram: Creation, Uses & Benefits

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  1. Overview (1 of 2) • Definition • Uses • Ishikawa • Use within organizations • benefits • Creation of the Diagram • Steps 1-9

  2. Overview (2 of 2) • Example • Service example • Exercise • Ham Industries

  3. Fishbone (Cause and Effect or Ishikawa) Diagrams (1 of 4) • Named after Kaoru Ishikawa • Japanese Quality pioneer • Resembles skeleton of a fish • Focus on causes rather than symptoms of a problem • Emphasizes group communication and brainstorming • Stimulates discussion

  4. Fishbone (Cause and Effect or Ishikawa) Diagrams (2 of 4) • One of Seven basic tools of Japanese Quality • Leads to increased understanding of complex problems • Visual and presentational tool

  5. Fishbone (Cause and Effect or Ishikawa) Diagrams (3 of 4) • Typically done on paper or chalkboard • Recently some computer programs have been created to make Fishbone Diagrams • Ishikawa Environment

  6. Use in Organizations (1 of 2) • Can be used to improve any product, process, or service • Any area of the company that is experiencing a problem • Isolates all relevant causes

  7. Use in Organizations (2 of 2) • Helps bring a problem into light • Group discussion and brainstorming • Finds reasons for quality variations, and the relationships between them

  8. Creating Fishbone Diagrams (1 of 4) • As a group: 1. Establish problem (effect) -state in clear terms -agreed upon by entire group 2. Problem becomes the “head” of the fish -draw line to head (“backbone”)

  9. Creating a Fishbone Diagram (2 of 4) • Decide major causes of the problem - by brainstorming - if the effect or problem is part of a process the major steps in the process can be used 4. Connect major causes to backbone of the fish with slanting arrows

  10. Creating a Fishbone Diagram (3 of 4) 5. Brainstorm secondary causes for each of the major causes 6. Connect these secondary causes to their respective major causes 7. Repeat steps 5 & 6 for sub-causes dividing with increased specificity - usually four or five levels

  11. Creating a Fishbone Diagram (4 of 4) 8. Analyze and evaluate causes and sub-causes -may require the use of statistical, analytical, and graphical tools 9. Decide and take action

  12. Example (1 of 4) • Step 1 & 2: Poor Service (“backbone”) (“head”)

  13. Example (2 of 4) • Step 3 & 4: Responsiveness Appearance Poor Service Attention Reliability

  14. Example (3 of 4) • Step 5, 6, & 7: Responsiveness Appearance time equipment personnel facility Poor Service accuracy One on one service courtesy dependability Reliability Attention

  15. Example (4 of 4) • Step 8 & 9: • Use tools to analyze and evaluate causes • Pareto diagrams, charts, and graphs • Statistical analysis for causes in processes • Decide and take action • Use fishbone diagram, analysis and evaluations to find causes that can be fixed • Take action to eliminate and fix problem causes

  16. Exercise • Create a Fishbone (cause and effect, Ishikawa) Diagram for the following: Management at Ham Industries has noticed that the productivity of its workers is well below the standard. After interviewing its employees, it was noticed that a vast majority felt dissatisfied and unhappy with their work. Your boss has asked you and a group of your peers to find the causes of worker dissatisfaction . Include all possible causes to at least the secondary level.

  17. Summary (1 of 3) • Fishbone Diagrams - visual diagram - resembles fish skeleton - identifies the causes of a problem (effect), and their relationships - created by Kaoru Ishikawa for Quality Management

  18. Summary (2 of 3) • Organizational Uses • Increases communication about problems • Used to improve any product, process, or service • Important part of quality management

  19. Summary (3 of 3) • Creation of Fishbone diagrams • Problem or effect is head of fish • Identify major, secondary and tertiary causes, and attach to backbone identifying relationships • Analyze and Evaluate results • Act to fix the problem(s)

  20. Bibliography //home.t-online.de/home/kfmaas/q_ishika.html www.zi.unizh.ch/software/unix/statmath/sas/sasdoc/qc/chap17/sect1.htm www.dti.gov.uk/mbp/bpgt/m9ja00001/m9ja0000110.html Foster, S. Thomas. Managing Quality: An Integrative Approach. 2001, Prentice-Hall

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